Quitting is hard. I've been there. But it is one of the smartest decisions that I have ever made (starting smoking was one of the dumbest ones).

What helped me included:

Sugarless gum. I purchased Trident by the multi-pack.

A "cigarette" pacifier. I just took a small piece of paper and rolled it into the shape of a cigarette and put a piece of tape on it. A straw cut in two might work also. I could then go through the motions of holding, or even taking a drag off of a cigarette and this would look silly, but get me through a craving and help calm me down.

Throwing out any remaining cigarettes so that I wouldn't be tempted.

I think though, that the mental part of it is most important. You have to QUIT smoking - you can't delude yourself into "quitting" smoking. Either you are a smoker or you are not. The people that I've seen be the most successful are the ones who quit and don't look back. They don't bum a drag or a smoke from a friend or just cut down to one or two a day.

To paraphrase Yoda "Smoke or don't smoke - there is no try"