I smoked for 21 years, give or take a year. I have tried numerous techniques like everyone else, what made me stop… I would lay in bed at night and listen to the rattle as I take a breath. My father has infazema and can’t walk twenty feet without needing a break, I knew it wasn’t going to happen to me. I learned to dip snuff while in the Navy, I was an aircrew man and couldn’t smoke for hours at a time. This created a duel problem as I have used both for the last eight years, but it also contributed to the cure. I started to use dip only for two weeks, and then I moved to cigars and dip for two weeks, then I smoked cigars for two months (not inhaling) on and off. The last day I had any nicotine was September 10 2009 I will never use it again. As a side note I did not drink for a month after I quit, this was the most difficult, as well as the most important part. My wife still smokes and all I have to say to her is “you stink”.
Good luck and I hope this works for you.