Sometimes when I’m trying to get my head around something complex, I suddenly feel overwhelmed and my head starts to feel like its about to explode. I realize that there are at least a dozen cases which I’ve failed to consider so far. All the thoughts I was trying to keep track of just runs off in every possible direction and I can’t chase them all. Dispair overwhelmes me. Then I have to close my eyes, take a deep breath, hold it for a second, and let it go slowly. Then start over, think it through one more time.