i smoked from age 15 to 28 and it's been 6.5 years since i quit. i was very similar to serialsinner in that i had very strong ties to smoking during certain activities like drinking coffee, after a nice dinner, with particular friends, with alcohol etc.
if you can, quit cold turkey. if you don't feel you can, then maybe my experience will help.
i decided i needed to start tackling each of those habits as milestones. so i started with my morning coffee. i used to have a cigarette soon after waking up, then have coffee and more cigs. so i decided each day for a week i was going to wait one extra hour before having a cigarette until i managed to enjoy my morning coffee without a cig and next thing i knew it was lunchtime. i felt free of cravings in the mornings and by conquering that first habit i felt empowered. it was easy then to go another week by increasing one more hour each day until i was only having a few cigs in the evenings, usually with a drink and after dinner.
the last habit of drinking and smoking was the hardest for me. i spent a few weeks not going out with friends to bars, esp. if they smoked. and eventually i was able to separate smoking and drinking. they did not have to go together.
once that happened, it just came down to one thing. making a choice. i decided i no longer wanted to smoke. i didn't want to smell bad. i wanted food and wine to taste better. i wanted to prove i could do it. i wanted to set an example for my friends. and the list went on so that i had no option but to follow through with my choice. if i smoked, it was because i was choosing to do it and that was no longer acceptable.
good luck! you are fighting a tough addiction but it is so worth it.