My most important routine daily activity is 30-45 minutes of callisthenics (abs, push-ups, etc), then going running in the wood for 30 to 45 minutes. 15-20 years ago I used to do that between 7 and 9 (bringing children to school in the middle), but now it tends to happen more around 11:30, because I can't get up before 8:30 anyway unless there is a really tough deadline.

Does it make me productive? Not at all. But at least, it makes me extremely healthy :D