There's all sorts of reasons people quit smoking...health should be the #1 concern, but what really did it for me was writing down everything I spent every time I picked up a pack. Not only cigarette costs, but every time I'd go into a store, I'd also get a coffee, a monster, a bagel, or a lighter, or something else. Seeing that written down on paper for a month or so really bothered me. Since I stopped smoking, the additional expenses have gone down considerably as well.