I've been working on a side project which falls into the category of hacking motivation. Streakflow[1] is based on Jerry Seinfeld's "don't break the chain"[1] mentality that I've seen mentioned here before. It really helps when you don't want to do something because the thought of having to start over is worse than just doing it.

[1] http://www.streakflow.com [2] http://lifehacker.com/5886128/how-seinfelds-productivity-sec...