Now that running regularly, for fitness and to keep my weight down, is a well established habit, I've signed up to run a half-marathon next March. (Not without a twinge of sadness, thinking of Hal Finney.)

Instead of just going out for a run on sundays and the occasional weekday, I'm now "following a training plan", that is, running workouts with specific targets, using a heart rate monitor, and so on. It makes some interesting differences and I've learned a few things.

One aspect of keeping fit that I'm still somewhat failing at, despite much self-monitoring and various attempts at behavior change, is getting more sleep. I'm still sleep-deprived (less than 5h) two or three nights a week.