How did you stop smoking? What was your motivation, and how did you finally do it?
And how long have you been a non-smoker?
For me, at the time it was the realization that I cannot continue to smoke and continue to play the trumpet. My lung volume and strength really suffered. But instead of stopping to smoke, for many months I played less and less trumpet.
What put me through the phase of actually smoking the last cigarette and becoming a non-smoker again, was one of the books of Allen Carr, I don't remember the exact title. Looking back, it was awfully written, and I had to will my way through believing the narrative, but it worked. That was 27 years ago, and I didn't have one cigarette since, no cravings and no replacement either.
I tried forcing myself to stop multiple times and it never worked, but December last year I framed it as "how long can I go through the new year before I have one." Haven't had one since, and now actively avoid them because I can't stand the smell.