Smoked for 15 years, quit for 10, started again, smoked for 3 years, and quit for good (I strongly believe) 3 years ago. For me, the key was (is) recognizing nicotine as an addiction, not a habit or something we do "because we like it." Even though, in my mind, I am done with cigarettes for good, there are times when I am tempted (bored, hanging with smokers, stressed, whatever). That's when I have to tell myself that nicotine is a drug, I am a recovering addict to that drug, and I can't slip and "have just one." The desire passes, and does not occur as frequently, but I can never completely forget that it once had me. Although not directly a friend of Bill's I am close to some that are, and think lot of that applies here. Good luck, and for what it's worth, remember that the desire will pass, but the regret for slipping may not. You are doing the right thing, for you.