Good luck, dude. Quitting is all a mind game, from my experience. Learn how to change your thought habits, and you are home free.
Like this:
As a smoker, you plan your smoking, make sure you have your lighter, make sure you have butt's, look forward to the next cig, ETC.
When you quit you can fight these thoughts, but it's like fighting the tide. The thoughts stay, you just fight them, and eventualy you fall back.
Another choice, the one I found worked for me, was to replace them. Make sure you have your wallet, and belt, and cell phone. Plan your dates, your work schedule. Look forward to getting home and listening to some tunes.
If you replace those paterns, and keep them replaced long enough (I read in a psych textbook that it takes 21 days to replace a thought patern), you will find they are completely gonne.
Again, it's not the actions that aer the thing to pay attention to. It's the thoughts. Remember to wrinkle your nose (internaly) when you smell smoke. Remind yourself of how much the smell of smoke sucks. Remember how much smoke can make you cough, and feel sick. Focus on things like that, and you are home free.
Focus on the 'I can't smoke, even though I wish I could' and you are as good as smoking again
Good luck, and hope some of this rambling helps.