There are a lot of good suggestions in this thread.

I spent some time (while a smoker) designing a smoking cessation program for the American Cancer Society. I ended up being a non-smoker.

My suggestion is to pick up a copy of a book called "21 Days to Stop Smoking". It is keyed to each day of the first three weeks of giving up smoking. It deals with the issues of the first days that are different than those of later in the first month. For instance, around the first four or five days, many former smokers start to cough. They find it discouraging, especially f they haven't been coughing before. After all, they were giving up smoking for health reasons and now they are couhin. The book explains that the coughing is actually a good sign and why. It also helps a new non-smoker to deal with backsliding, a cigarette smoked at a time when temptation was just too much.

Good luck. It's tough but it's worth the effort for lots of reasons.

Sourdough