I was fortunate enough to be able to quit cold turkey. I stopped when I was out of a stressful environment for a week (I was working at Urban Outfitters/FreePeople/Anthropologie and dealing with b*tches 24/7 on the phones). I took a vacation for a week and didn't want one AT ALL the entire week and had the willpower not to go back when I was at work.
As for Chantix (
http://www.chantix.com/), my mom and aunts did it. My aunts have been successful. My mom has had to do it 3 times and it STILL didn't work. She finally quit cold turkey.
I would recommend keeping chewing gum with you (not nicotene gum, it's absolutely disgusting, tastes like pepper and medicine). That seemed to help me a little bit more as well.
I feel 1000X better now that I've quit. I can actually breathe and I'm telling you, once you quit for a few months, you will walk by someone smoking and realize how gross it smells and think, "Did I really smell like that?"
I quit once before that and the first cigarette I picked back up gave me a WICKED migraine.
Don't know if that was helpful or not, but YOU CAN DO IT!