I guess I got lucky. I quit cold turkey after smoking consistently for 3 years. 2 of those years, I was smoking a pack and a half a day. After about 3 weeks I wasn't craving it anymore and somewhere around the 6 month mark, I found the taste of a cigarette disgusting. I might have part of a cigarette once or twice a year when I go out drinking but I haven't bought a pack of cigarettes in about 8 years.