Over at Yahoo! Finance there is some good advice on New Years Resolutions.
For those difficult resolutions like ridding yourself of bad habits, exercising regularly or eating for health, I use the New Moon (short term) resolution system. It works wonderfully well. You resolve to do a particular thing from one New Moon to the next. A day or two before the upcoming New Moon evaluate how things have progressed and if all looks well re-instate it for another cycle. Otherwise pitch it. It's a lot easier to deal with a tough situation one month at a time.
Treat yourself to doable resolutions [Yahoo! Finance]