I quit 8 years ago, if I wasn't drinking it would be two packs a week, but when alcohol was involved ashtrays would fill up really fast. Still after 8 years I find it hard not to bump a smoke when I'm drinking with friends who smoke.
Quitting is all about changing habits, when I quit I started exercising like a mofo; swimming 4 to 5 times a week, running, hiking. I didn't tell anyone so there wouldn't be any pressure if I failed and didn't drink or go out for six months.
The best thing about not smoking was how much it improved sex.