I was able to quit cigarettes reading this:
http://www.easywaypublishing.com/products/the-easy-way-to-stop-smoking-3/
I think it works similar to hypnosis, in that it is written in such a way as to worm into your subconscious. It’s simplistic, repetitive, and straightforward. Almost embarrassingly so - but that may be why it worked for me.
1/4 the way through, I was rolling my eyes. 1/2 way through I was saying “if this guy didn’t repeat himself so often, this book could be much shorter”. 3/4 of the way through, I thought “maybe I can finally do this”.
I quit for a year - all tobacco. Wasn’t easy, but easier than the other 14 methods I had tried 20 times a piece. Started smoking a pipe a year later - not to get nicotine (I actually like my low tolerance now), but for it’s calming, contemplative ritual that I missed during my quiet time “smoke breaks”. With 2 or so bowls a day, and an interesting snuff or two at work, I am free of the nicotine monkey, can enjoy tobacco in a way I am OK with, and can breath again.
Off soapbox. 