There have been some excellent suggestions posted here already so I won't rehash them, but I quit smoking on November 5 of last year after 35 years of puffing away (moderate smoker last 15 years....probably 10-12 cigs/day). I was able to quit by going cold-turkey after deciding that I really WANTED to quit. Each time I tried to quit in the past, I did so because I felt it was the right thing to do, not because I really wanted to. So, I would tell you that, at least from my perspective, unless you sincerely and truly WANT to quit....you won't.
It wasn't easy at first, but after 3 or 4 days the urge to smoke began to lessen. The physical withdrawal to nicotine only lasts about 72 hours, so if you can make it through those first few days, it gets easier. I signed on at quitnet.com and found support each time I felt a weak moment coming on. Quitnet has a great tool to help keep you on the straight path....it's a Quitometer that keeps a running tally of how many days, hours and seconds you have been smoke free and how many cigarettes you have not smoked during that time. It also shows how much money you have saved and how many days you have added to your life expectancy. So far, I have not smoked 2,545 cigarettes, have saved $445.20 and have added 19 days to my life expectancy. Put into this perspective, you want to keep the streak going!
I was really worried about booze and coffee since both of those are serious triggers for me, but I was surprised how easy it became after just a few weeks. Now, I can sit in a smoky bar (although being around cigarette smoke now disgusts me.....yukkk!) and not even have the slightest urge to light up.
Now, just 8 months after I last smoked, I never felt better in my life and I can't even imagine myself going back to smoking at this point. You CAN quit....but only if you really want to. I'm living proof!
Remember the Quitnet acronym....N.O.P.E. (Not One Puff Ever). Good luck!
See these URLs:
http://www.quitnet.com/
http://img48.imageshack.us/img48/5706/cigaretteprison6mb.jpg