So what about thinking about something else? Well, it's hard to think of something else that can deliver such pleasure as this magic memory. Even if they successfully think of something else and overcome that urge, they walk away from the moment with a sense of longing or sadness with what they have just been deprived of again.
So, what is an ex-smoker to do? Change the tactic. Instead of trying (often unsuccessfully) of something else, acknowledge the desire. Don't tell yourself you don't want one, you do and you know it. But remember there is a catch. To take the one you have to have all the others with it. And with the others, you have to take all the problems that go with "them." The smell, the expense, the embarrassment, social ostracization, the total loss of control, and the health implications. The health effects are the most serious of the implications considering they lead to slowly being crippled then death.
I am not saying to look at cigarettes negatively, just look at them exactly as they really were. If you pull the whole spectrum of smoking into focus, you will be able to walk away from the "urge" with the attitude that you are glad you are not doing that anymore. You won't feel deprived you will feel grateful. The more you remember smoking the less you will think about a cigarette. In a sense forcing yourself to remember will help you forget. Not forget smoking, but the fantasy, the appeal of a nicotine fix. A nicotine fix was not worth smoking for while you were a smoker, you can bet it is not worth it as an ex-smoker with freedom to lose now as well as all the other implications that always went with smoking.
Again, it can't be said too often, you are fighting for your health and your life. To win this fight is no more complicated than just keeping your commitment enforced to never take another puff!
Joel

