From 40 a day to nil.Yes it is possible this is how I did it .
1.) First study your smoking pattern write down when/under what circumstances you smoked .How many times, did you smoke impulsively,do you tend to lite a smoke after a drink or a heavy meal.After/before a flight.
2)Now study your own pattern and build up a resolve to attack a pattern.One pattern at a time.
3)Do it.
I t took me one long year to stop smoking then started and stopped a couple of times.Not tried one for 6 years now .