Here's my advice.

Rule #1: Avoid evironments that make you want to smoke (e.g. the bar, hanging out with smoker friends)

Rule #2: Get some drugs. Not the fun kind. Talk to your doctor and they'll likely prescribe you a low dose of Welbutrin or an alternative that you'll take for the first few months.

Rule #3: Don't be too hard on yourself. You're going to slip up. That's okay. You don't have to give up and start over.

Rule #4: Make it hurt (your wallet). If you buy a pack, have one cigarette, then snap the pack in half and throw it in the trash.

Rule #5: Replace your smoke breaks with another habit (e.g. going for a walk)

Rule #6: Learn to hate the smell. Wash your clothes, clean your car. Then, when you slip up after getting unused to the scent, you'll be fully aware of just how pungent that cigarette smell is.

God speed, comrade. It's a journey.