I do not know if this has been mentioned before, but hypnosis works -as administered by a trained pychologist! It did it for me, back in *cough* '84.
I came out of the 25 min. hypnosis session high a kite, a real funny thing... I remember having a hard time writing the check at the receptionist's counter...!
I was really wired up for a week. Under a fast-approaching deadline, my boss, old yankee type, made a sideways remark... I almost told him to get lost!!
Another vivid memory was, after three weeks, being in a convenience store, looking at the overhead cig. racks and thinking... "hmm, what ARE these stange things people are buying/sucking on?"
One important thing I learned: it is imperative to not TOUCH cigarettes, packs, ashtrays, etc., as this would tend to "link" you back to the habit/addiction. That's why it does not work well with food addictions. A friend also explained how the less you know about the technique of hypnosis, the more effective it will be.
Note that I smoked a little bit of a cigar on Thanksgiving last year, 20+yrs after quiting) with no ill effect. It was OK, not that great, we were drinking sup-par BMC...