I've been a 3+ pack a day smoker for 35+ years. Haven't had a smoke for 45 hours.

I was about three packs a week for 25 years. Quit two years ago when I got my 73 Cuda. I figured that $100+ a month would be better spent on car parts. I'd quit several times for up to a year but always cheated here and there and then would fall back in. First couple days were tough but you got to keep focused for about two weeks. The desire never goes away. I have the hardest time after a couple beers, and I used to go out and sit with a smoke while a pondered a problem. Find a substitute like toothpicks or something to keep your hands busy if you need to. Keep it up. If it seems like it's too tough, come back to this thread and refocus or just post about it. I feel a hell of a lot better, my wife likes me not stinking and I'm not badly influencing my kids anymore. There are no positives in regards to smoking. This is the one time in your life where being a quitter is the best thing you can do.