Another change I've made recently to help with my overall health is to try using a scheduling infrastructure for my day. For about three weeks now I've been using the Pomodoro Technique to plan and track my activity throughout the day. It's improving my productivity and also helping me lose weight. This relates to my physical health in two ways, first if I spend my days full of anxiety about all the things I'm not doing I can never get physically well. Second it makes me do push-ups.
That probably needs an explanation. Pomodoro is a time-boxing technique that guides you to do 25 minutes of highly focused activity followed by a short 5 minute break. In the PDF the author suggests it should be a real break from any thinking about work. I found the transition from a hard thinking task to a state of mental relaxation to be very difficult to pull off, my mind–already warmed up to the topic–would wander back to the problem I was working on. So I decided to do a set of push-ups to help me relax.
So far I've gotten better at pushups, squats, and sit-ups. Oh, and I'm enjoying my productivity based primarily on the structure to my day. It helps me concretize the idea that I can only do so many things in a day and helps me at the hard task of prioritizing my time. It also helps me measure how long I take at certain tasks. Since I chronically underestimate I welcome the opportunity to improve my judgement.