Imposter syndrome is a psychological phenomenon wherein an individual is convinced that they do not deserve the success that they have achieved despite (perhaps extensive) empirical evidence to the contrary. For me, this usually manifests in the thought:

I've somehow convinced everyone into believing that I'm actually good at this.

followed by the horrifying notion that eventually I'll be found out and my world will collapse.

I believe that the imposter syndrome is not uncommon in academia. I'm interested to know how other people here have experienced and dealt with it.

In particular, I'm looking for actual tactics that someone might use to combat imposter syndrome.

Why I asked this question:

Beyond the obvious reason that this is something I have struggled with for many years and only recently gotten a handle on myself, there's also some evidence that merely realizing that other people experience imposter syndrome helps fellow imposters. As a grad student, I've managed to meet a fair number of people who are in their own struggles with imposter syndrome; however, the tactics and self-trickery that have helped me don't always speak to them and perhaps someone else's methods might.