This began as a comment, switched to an answer, and just kept getting longer, so I'm gonna have to split it into sections...
Reframing the problem
I disagree that it's "procrastination no matter how you look at it," and I wonder how many ways you've actually tried looking at it. I say this somewhat confrontationally, but very sympathetically, as I've struggled with the sense that I'm just procrastinating throughout my free time in higher education, and ultimately rejected it. There's a lot more to life than work; this is easy to forget in grad school, and there's a lot of pressure to do so. Ask yourself whether you care about the things you spend your time on for other reasons you haven't fully acknowledged, or whether you're judging those pursuits as wasteful by someone else's value system, not your own. I see from your other questions that you have struggled (as I have) with the sense that other people judge success by the wrong criteria, and ignore opportunities for lateral growth if it doesn't follow their narrowly defined path to [_insert_short-term_work_goal_here_].
If you sincerely think those other concerns of yours aren't valuable, ask yourself if you could stand to work instead every time you notice yourself switching your focus over to one of those concerns. If you can't, you may find that there is some necessity to the (non-work) concern at hand, and may want to reevaluate it again at that point while you're in the moment. If you still feel there's no value to it, ask yourself whether you are just looking for something else (anything, really) to do instead of working. Ask yourself if you don't want to work on some level, and if so, why that might be so.
Given your situation (which was also my situation at times, in ways), you may be finding yourself more free from extrinsic motivation (pressure, expectations, "or-else" negative consequences, and so on) than you have been for much of your academic career. The transition from inflexible, specific, structured deadlines (which probably begin in middle school and carry all the way through the first year or two of a Master's program) to a more diffuse sense of partly internalized pressure and guilt for not being a more diligent workaholic is a subtle transition that occurs most dramatically in grad school (or so I'd say, based on our shared experience with hands-off supervisors). As you slowly realize you're falling behind in some sense because you're taking time off from work to handle your own life, you realize you can't count on those old, structured sources of extrinsic motivation that almost feels like a fight-or-flight response to an encroaching predator (e.g., the "cram-or-fail" decision on the night before a final exam). Those of us who make it this far have probably mostly chosen to run into the jaws of the beast and do battle with it in our flight from abject failure, but some of us have only done this when we feel ourselves running out of time to make a choice of which it's going to be.
Avoidance-avoidance conflicts like those resolve themselves (or force you to resolve them) because when the deadline comes, you have to choose. Without the climactic anxiety of the confrontation that motivates a resolution (however hard-won it may be even in these cases), conflicts can linger much longer in the post-deadlines careerscape. The emotional experience is different: the anxiety is more insidious than in-your-face, and can be tolerated much longer. You can start to feel the internalized sources of anxiety more as you worry less about others' judgment; you can become your own worst critic, and feel more guilty, depressed, or apathetic than truly anxious in the old familiar sense. This is still extrinsic motivation, but it's introjected in that it's internalized: you are now the source of your own negative self-evaluations. (This need not be exclusively true to apply.)
Reframing the solution
This kind of problem takes a different approach to resolve. You can probably find a million self-help blogs about how to be your own supervisor and boss yourself around so you can go back to the old model of operating under artificial, externalized pressure. E.g., "I must spend one hour working everyday before breakfast," or, "Whenever I read the newspaper, I must count the time I spend and put the same amount of time into [staring blankly at] my project." You can find a lot of similar answers to "How to avoid procrastination during the research phase of my PhD?" the second most popular question here at the moment. One of the problems with approaches like (some of) these is that they'll give you a whole new way to go to war against yourself; you'll have to take your infractions very seriously if you're going to take the system seriously at all, and you're probably not going to want to. You'll have to tell/force yourself not to do what you want to do, even when you have good reasons or special opportunities (unless you complicate your system and give yourself vacation time, indulgences, or mulligans, which might not be a bad idea). Another problem is that when you've put in your time or satisfied whatever other requirement you've assigned yourself, you'll feel just like you always did (if you were like me in this regard too) after finishing your self-assigned "homework": ready to go blow off the steam however you can, which probably leads you back to those "procrastinatory" habits you're fighting. If it does, that's a sign that those habits might be the ones that replenish your energy, fulfill you emotionally, and help you feel more like a whole person, more like yourself, and less like a dusty, malfunctioning computer that's been cooped up in a cramped cubicle for too long.
I think the better approach than stealing happy hours while you're off-the-clock (or stealing them from yourself while you're on) is to work more introspectively on your motives and values. I would think this—I'm a personality psychologist—but it's done me a lot of good. I still don't necessarily focus when I should (I'd probably have more publications by now if I did), but I don't feel like I'm wasting my time when I'm not focusing on work. I focus on what I'm doing instead, I enjoy and value it (or through patient introspection and experience, I gradually come to the conclusion that I don't, and I quit), and I don't beat myself up for it during or afterward. I trust that when I want to do something, there's probably a good reason, and I strive to understand it. If I can't find a good reason, I often find that I don't want to do it anymore; problem solved (usually). This has led to some extended "vacations" from work, during which I focus on other things I care about (e.g., a video game, or Stack Exchange!), but when I get to the bottom of what I'm after in these pursuits, and I get it, I'm enthusiastic to return to my work, and I bring new ideas to it. I integrate these diverse experiences, and I enrich my work in the process.
What I'm describing is a shift away from judgmental devaluation of extracurricular "distractions" to a recognition of and reconciliation with my broader set of values, which include my career, achievement, and financial success, but don't end there. I'm my own boss now (read: unemployed :P maybe you shouldn't listen to me!), so I get to enjoy that freedom (and pay the price for it)...and I do enjoy it. I enjoy my work too! Not feeling constantly indebted to it is very important for that feeling, that autonomous, intrinsic motivation (see the same links as before) to arise. Finding joy, fascination, excitement, and the energizing yet relaxing release-through-work of the flow state is all about letting yourself love what you do when the time is right, and knowing it's right because you've defined what you need to do on your own terms: terms of what you want to do (intrinsically), or at least what you really care about (identified motivation, which is often good enough; same links as before). Once you really understand what you're after, your sense of purpose, you can start organizing your projects around it and deriving natural, enduring motivation for your work. You won't want to quit and do something else so often, you'll start waking up eager to work, and if anything, you'll suffer for finding it harder to pull yourself away from your work to eat, sleep, make sweet love down by the fiyah, or whatever else there is to do with life that starts to seem strangely less important.
Acknowledgements, credentials, disclaimers...
I know this sounds like a new-age meditation mantra or performance-enhancing nutritional supplement commercial, but I assure you, these are at least the implications of honest-to-goodness psychological theories of motivation (which are my area of expertise), passed a few times through a thick filter of personal experience. I'm not a typical success story myself (if a success story at all so far), but I have succeeded in rediscovering my love for my work and motivation for focusing on it in a big way by introspecting on these matters of my motivation and values, and indulging my urges to do other things than work at certain points throughout my graduate career. I think I'm a much better psychologist for having "walked the walk," even if I haven't talked enough talk yet to convince others with my publication record, and I know that when I publish the manuscript version of that dissertation I linked above, it's going to be a hell of a lot better for all the time I've spent delving into statistics (and Cross Validated!) over the past few months when I "should've been" writing instead for fear of not publishing rapidly enough. Because I allowed myself to redefine my work in terms of what I value rather than in terms of what was going to get me the most immediate recognition and paycheck (again, extrinsic motives), and because I'm lucky enough to afford the opportunity costs, I put in two months of probably the hardest and most consistent work I've ever put into refining my research, put to rest all my old insecurities about my rate of progress, and apparently can't stop raving about everything I'm learning and how much better I feel about it all now. I don't yet know how long I'm going to be able to keep this up before I start "procrastinating" again (one might argue I'm doing that now), but the plan is to stay this way as long as I can: self-directed, secure, deeply enthusiastic, and well-aligned with my values and overall sense of purpose. The productivity has already started flowing out of this life transition, but it would take a lot more talking to prove it, so I'll leave it at that for now.
I should also note that there's some risk in this approach. It's a long road, you may not have the time and freedom to follow it as far as you need to for the results you might want, and it may not ultimately lead where you think you want it to right now. This is the stuff career transitions and midlife crises (not that I would really know about those first-hand just yet) are made of: confrontation with what you really want and care about, and its juxtaposition with what you're actually doing. Better to get it out of the way while you're young, I say, but maybe not when you're less than a year away from finishing your PhD, if there's some risk you won't as a result. If you can't afford to take your time, this isn't for you. It's a long-term approach that ought to pay off in the end, but there are certainly no guarantees, and it might take a very long time indeed. If you've had the patience to read this far, you just might be ready for it.
I mainly offer this because you remind me of myself, and both of us remind me of what I study, and I'm currently my own guinea pig undergoing very informal road-testing of these theories, for which I could provide plenty more references, but which take some contextualized interpretation to apply here. It's definitely too soon to claim conclusive support for the theory from my own life, but I feel like I'm closing in on that result very rapidly now. In whatever you choose to do, I wish you the best results, and hope you'll come back to tell us what you choose and how it goes. If this self-indulgent autobiography of mine doesn't get downvoted through the pavement, I'll consider doing the same. Cheers!
P.S. In response to your comment on @aeismail's answer, I want to emphasize that part of the benefit of my approach for me has been taking my former advisor's voice out of my brain and rediscovering my own voice. Those two months of hard work (seriously almost all-day everyday studying!) were in pursuit of my own solutions to my own research problems. Because I started listening to myself better and allowing myself to direct my own research according to my priorities, I've learned probably a year's worth of statistics that helps me handle the conceptual bits of my own project in ways my graduate advisor was never going to even while I was still there. If you can give it the time, and accept that you're your own best supervisor, and avoid being or becoming your own worst critic, you can solve those problems as well as anyone can. Ask your supervisor and everyone else you can for input and guidance, but know that you're ultimately the one who has to steer the ship, and don't take your hands off the wheel for a second! But do pull over once in a while to stretch your legs and smell the roses; it's just another way of putting gas in your tank.