Comment Move your body whenever you can. (Score 1) 865
If you can't do any of the other suggestions (such as getting a new job or moving closer) then I have the following suggestion.
If you are on the phone or waiting for a system to boot, start marching or do knee bends. Wave your arms around. If you look at what you do all day you will find that there are many short times when you are waiting for something. Use these moments to exercise. My wife and I went to a medically sponsored weight loss class and one thing they emphasized is that you don't have to have long workout sessions, rather the total exercise time, even if it is done in small bites, is what matters.