I don't really do much. I just try to decide if I'm proud of the decisions I'm making and whether or not if, I were someone else, I would judge myself harshly.
Sometimes you have to step outside of yourself and be objective about what you see.
This is definitely me, especially the judging harshly part. I'll psycho analyze anything that I did in the past including my emotion at the time, as well as the circumstances at hand. Then, I judge myself very critically, and after that's all said and done, I will seriously think hardcore about anything that I should have/could have done in that situation instead of being dumb.
...If it's something that more or less, left a more positive effect on me, I'll think about that moment like crazy, and try to embrace that same feeling that I felt for all that it's worth.