I second the "one trial at a time approuch".
I've successfully managed to run every morning for 2.5 months last year, using the seinfeldian chain at
Daily Sports | smarterfitter.com until an illness sent me off track.
Now I'm pretty intrigued by the idea of combining habits and rewards at
Featured Windows Download: Motivate Yourself with Point Motivator, haven't tried it yet though.
I'm intending to start a raw trial soon after learning from Steve's experience in january.
I'm pretty impressed with fitday.com as a tracking tool, although unfortunately it seems like I can't order their PC version with a German credit card, they only accept US or Canadian...
Alex