I'm pretty good at quitting, just not so good at not smoking. Interesting you ask though, I've been quit for two months yesterday. Here are some things to try:
Since you gotta want to quit. make sure you really do, otherwise don't waste your time.
If you really want to quit, take as much time off of work and away from family stress as you can manage - a couple weeks could make the difference. if it isn't worth the trouble or sacrifice of your vacation you don't want it.
Quit cold and hide out with your favorite crutch (choco/magazines/movies/etc) for 3-5 days to get over the physical effects.
Give yourself another week with as little stress as possible and start exercising and working your way back into life a little at a time.
But all that is just quitting, not smoking is the hard part. As it turns out I like to drink and I've proven to myself over and over that if I drink I'll eventually chippie a smoke and if I chippie once, sooner or later I'll start up again. So I'm permanently on the wagon - from at least a 12er of cheap beer a day - every day.
Oh and just to round out my friggin pristine lifestyle, I've also given up on sugar. The doc said it was the stress of going cold turkey on smokes and booze that kicked my latent/unknown diabetes into overdrive, knocked off about 25#s in a couple weeks and put me in ICU in a near coma.
The only thing I'm hooked on now is insulin!

The legitimate object of government, is to do for a community of people, whatever they need to have done, but can not do, at all, or can not, so well do, for themselves -- in their separate, and individual capacities.
-- Abraham Lincoln, Fragment on Government (July 1, 1854)