Fidget to fight fat:

In a recent study, scientists from the Mayo Clinic issued motion-sensing skivvies to 10 heavy people and 10 thin ones, then recorded even their tiniest movements 24 hours a day. Ten days later they found that overweight people simply moved less than their lean companions, burning 350 fewer calories per day. To get yourself "fidgeting," plop down on a stability ball for 15 minutes each hour and use it to keep yourself in perpetual motion.