Make a pledge to spend more time on good things and/or less time on bad things. If you don't, Beeminder will take your money.
Just let RescueTime track where your time goes. It will automatically report it to Beeminder.
Beeminder will warn you if you're in the danger zone. As long as you don't let your dots cross the bright red line, your money is safe! (Details on our blog and RescueTime's blog.)