I believe that the best method of quitting is simply to stop smoking, cold turkey. It requires much more willpower but you'll feel a whole lot better after 2-3 days when the nicotine is finally out of your system. Odd things like chewing gum and inhalers (all loaded with nicotine) wont help much as your body (aka your brain) will still be addicted to nicotine.
Most people think that as long as you don't smoke all is well.. Truth is, nicotine is just as toxic.
Here's what I did. I purchased a pack of smokes (to ease my mind.. I guarantee you that if you get rid of all your smokes you'll instantly start to worry where to get your next smoke), put the pack in a drawer and didn't touch it. I went cold turkey, drank lots & lots of water to speed up the process of getting the nicotine out of my body, got some baby carrots to keep my hands and mouth busy, stayed away from things where I tend to smoke a lot (the pc for one, AO pvp ftw

) and dealt with the withdrawals as they came along.
The first 2 days were brutal, I soooo wanted to smoke but I hang in there and during the 3rd or 4th day I could feel my body relax again and it was awesome. However during that period I slept for maybe 5 hours so do it on a weekend

Also you'll experience neck/shoulder pains which is basically all the stress you have bottled up over the years, maybe even chest pains but all that should go away within a few days - If not see a doc just to make sure. You'll also feel more hungry as your cholesterol and blood pressure will return to normal. Don't eat fattening food but grab a salad, some carrots, fruit etc.
Anyway as with any product or method, some works better on others - I hope you stick to it and quit that nasty habit

You'll save a ton of cash, you'll start to taste food again, your clothes and house/apartment will smell better, you'll feel energetic too etc. Win/Win. Just don't make the same mistake I did and go out for beers ... Beers = Gimme a smoke now!
Good luck!