My wife battled the quit-smoking war for many years. She tried every angle there was, from patches to inhalers to cold turkey to you name it. Nothing quite worked; "emptying out" completely was always enough to drive her homicidal within 48 hours at the most.
Finally, just this past December, she decided to try hypnotherapy. Never had trusted the concept before but felt she was ready...and it helped. A lot.
Today, roughly 2 1/2 months after her 2 hypno sessions, she still smokes some, but the difference is night and day. She no longer lights up in the house at all. I take whatever she needs--right now an average of 3 ultralights per day, but she's poking pinholes in those, and she's out in the open air, so secondhand smoke is not a lot.
One example of how much she's changed: Yesterday, I had to run to town on errands and forgot to take her final cig of the day to the laundry shed where she lights up. She does NOT know where I keep her cigs in the house. I was gone for several hours...and this time, for the first time ever, she did not lose it. Just played one of her computer games till I got home, no sweat.
She still craves, she till smokes, but she's no longer using the patches (which she was) and expects to be completely off the stuff by year end...after what will by then have been a 43 year habit.