I've started using 21habit.com. I've committed $21 and will get back $1 a day for each day I successfully accomplish my stated goal (I will work out 30 minutes a day.) For each day I'm unable to accomplish the goal, $1 will be donated to charity (List of charities) Some people seem to believe that it takes 21 days to turn something into a new habit. This is widely debated (How long does it take to change a habit?) but I figured if I can do it for 21 days, it'll at least be a good start if nothing else. The end of my 21 days will coincide with my birthday. That'd be a hell of a birthday gift to have a new habit like this :)