I quit cold turkey when I was 31. Once I had made up my mind to quit that was it. I could never do the limited smoking regime of say only three cigarettes a day, one after each meal. After about two weeks of that I'd be back up to 30 a day or so (my max). For about a a decade after I quit I would have the occasional cigar but at some point, they started making me ill. In my mid 50s I smoked a few roll ups with a friend but that's been about it. I'm certainly glad that I quit. I had smoked for about 13 years between the ages of 16-31.