Ok, here is a major issue I have with much of my work (which is experimental/computational research): I am a graduate student, and spend much of my day doing 5, 10, 20 and 30 minute experiments (both biological and computational), which require set up and monitoring, but result in small to medium size hunks of time when I'm really not doing much (essentially just checking every 1-2 minutes to make sure everything is still working). During these periods of time I either a) attempt to do other work or b) procrastinate. Both are not great, since either a) I'm constantly shifting my focus from the latter project and end up making mistakes in it or b) I'm procrastinate (usually by reading articles, twitter, etc.)

Does anyone have advice for how to deal with these small, awkward period of times (< 30 minutes) - is there something which you find useful to do that you can also shift your focus from incessantly?