I was a smoker from when I was 14 until I was 19, I am 20 now.
I gave it up in September, cold turkey, no patches, pills, or hypnotherapy for me.
The only lapse I had was in November where I was stressed out a lot and I found 2 cigs and smoked them. I got mad at myself for doing that and haven't touched one since. It's hard right now though, since my brother in law smokes and they just moved here, so he's smoking around me a lot.