I quit cold turkey after 10 years of smoking.
#1 - I really wanted to quit, there was no other option(not because there wasn't.....but because I didn't want there to be)
#2 - Replace your habit with something else "less worse" or perhaps good. I chose Miller Light for a few days.
#3 - Remember why you are doing what you are doing.
I had cold sweats during sleep for about three nights, twitching.....it was actually scary. But you learn to deal. Kicker for me was my wife still smoked, in the house nonetheless......she still smoke to this day, though I have forced her to the garage.
It's one of those "anything's possible" moments.
I also used this site for moral support
http://whyquit.com/
It helped me stay informed.