http://whyquit.com
It's free and it works. My wife and I both quit after reading (almost) everything on this site. I didn't join their message board but my wife did.
Education was my best weapon. I started reading that site over a year before I actually tried to quit, but it was very important to my decision and my method.
I posted this earlier in the thread but I figured since it REALLY HELPED me, I'd reiterate.