Exercise before you reward yourself. Let’s face it: you’re going to watch television. You’re going to eat ice cream. You’re going to waste time on Facebook. No big deal. But the next time you do, make it a reward for something. Exercise beforehand. Walk up and down the stairs twice. Do ten sit-ups. Jog around the block. You were going to have the reward anyway, so just insert a little activity into your inactivity. And when you feel that you earned that television show or that ice cream, it’s even more enjoyable.