When I have unresolved tension left at the end of the session I cant get my mind off of the subject. I become nervous and irritable and poor company. I far prefer to end sessions with the completion of a module or its core functions or whatever.

I find a big difference between walking away from an unsolved bug--particularly when I've done a lot of rip and tear to isolate it--and walking away after I've written a unit test that doesn't pass yet. Leaving a bug unsolved is frustrating, and frustration isn't great for sleep (or for inflicting on other people). To me, an unsatisfied unit test is more of a statement of intent. A unsatisfied statement intent doesn't eat away at me in the same way that an unresolved problem does. And starting the day with that statement gets me moving a lot sooner than having to make up a new statement, particularly before that magic first cup of coffee.

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