I have a wall calendar in my den, and I mark a big red X with a sharpie every day I meet my daily goals, my "Keys to Weight Loss" (see My Methods page).
Supposedly this is a goal-setting technique used by Jerry Seinfeld. The idea is to see how long a "chain" you can make without having a break - then just don't break the chain.
Keep it simple though, don't try to be perfect and track 20 different things using this method.
Here's a free online version: Chain Calendar