I've been quit since St. Patty's day 2001; from 3 packs of Marlboro Reds/day for 25 yrs to nothing without any drugs. Yes, it was difficult, but with a great support group it is very possible.
1. Join a support group, quitnet.com is actually funded by the ciggarette companies in certain states as part of that big law suit that went down a few yrs back. You will find dozens of friends there that quit the exact same day you do and will be going through the same thing.
2. Drink a TON of water, every time you want a smoke just pound a glass. It repaces a bad habit with a good one and speeds up the process of cleaning your sysytem out.
3. The physical 'need' for a smoke goes away in a few days if you flush your system, the psycological desire stays with you for a long time. To quell that you need to change your environment -- stay away from those things that trigger you desire for a smoke, take up a new INDOOR hobby, go to the gym, stay out of bars, stay away from your friends that smoke and anyone that tries to enable you to do so.
4. don't replace the habit with another bad one. i.e. eating or cigars....
5. The most common element with everyone that I have talked to regardess of the method used is that YOU have to want it BAD.
Good luck, you CAN do it!