I "quit" about 20 years ago. I was less than a pack a day person and had only smoked for about 5 years so may. I might have had the addiction that others had. But the reason I put quit in quotes was because I didn't decide to quit put to postpone when I would smoke next. I dont like saying i'll never do something again. I liked smoking and didnt want to give it up completely though I knew I should. So I decided to reduce the amount I smoked. I played the "OK, I'll see if I can go 2 days". Then after 2 I decided to try for a week, then a month, then a year went by. After about a year I did smoke with a friend one afternoon, but felt physically ill the next day. I'd say over the last 20 yrs I've smoked a dozen or so times, always when drinking, and the next day I feel gross.
So I say I didn't quit, I just smole very infrequently.
Oh, also, weekly I put the money I would have spent cigarettes into a jar in my bedroom. While the bank would have been better, I liked seeing it ever day. After the first year I had a nice chunk of change that I used to pay for a weekend get away.