The big difference is you can quit smoking entirely and avoid places filled with smokers. You can't just quit eating and being around food. Everybody is different, and we all have to learn to deal with food and what we can and can't eat, as well as finding ways to make our chosen plan something we can stick with for life.

For me, if I didn't set aside a day or even one meal on a rare but regular basis where I could let myself eat "forbidden" foods without beating myself up, I'd have given up teh battle long ago! I know I have willpower and self-control, since I quit smoking over a year ago while working in a smoky bar! I just find it easier to pass up carbs when I know I can have them "some other time". I'm picking my battles. Cigarettes are "never again"... cake is "maybe some other time"..