Alternate standing and sitting every couple hours. Stretch in between. Get enough sleep. (You'll be more productive in fewer hours if you're well rested.) Drink

Alternate standing and sitting every couple hours. Stretch in between. Get enough sleep. (You'll be more productive in fewer hours if you're well rested.) Drink enough fluids. Walk a quarter mile twice a day. Do core exercises (crunches, planks). Eat well. Basically, take care of yourself. And make sure to spend a couple hours socially with the people you love at least once a week!