I quit cold turkey after being a 10 pack-year smoker. I'll tell you the truth: the first few days, maybe the first week, was complete and total agony. Once you get through that, you'll be okay.
I found an application for my Palm that kept a running clock of how long I'd been quit, how many cigarettes I'd NOT smoked, how much money I'd saved, and how much time I'd NOT shortened my life by, by not smoking those cigarettes. There were times when the ONLY thing keeping me from smoking was that I'd have to reset that clock.
I googled up a page of such apps:
http://www.fileheap.com/software/stop_smoking.html . You might check it out; it was a great tool for me.