Don't quit cold turkey. Every time I've done it, I haven't been able to get over the cravings, as they totally destroy my willpower. You need to cut down huge. Just like have 1-4 a day, and you'll be amazed at how quickly the cravings dissipate. I used to smoke more than half a pack a day, and after three days of having 2 smokes per day, I've only gotten one craving today. And I haven't had my second smoke yet.