Hey man, hopefully I'm not too late to the party and you'll actually see this. I quit smoking last April after being a fairly heavy smoker for ~6 years. Here are the best tips I can give you:

1. The absolute most important thing for you to remember is that it will get easier. The first little while sucks, and it's a constant battle of willpower. This was the reason I was unable to quit the first few times I tried. Not because it was actually that difficult, but because I was trying to picture dealing with that feeling for the rest of my life and kept saying fuck it. But the longer you go the easier it gets, I promise.

2. Don't make excuses. It's really easy when you're drunk or above a [1] to break down and have one. This is crucial to avoid, because it inevitably leads to slipping up and buying a pack, then going right back into the cycle. Which brings me to my next point:

3. Build a streak. If you slip up and decide to smoke one cig after trying to quit for a few days it's much easier to justify doing this a few days later, which again, leads back into the same old cycle. The longer you go successfully resisting urges the more of an accomplishment it becomes and the less willing you are to blow it. It manifests itself in a bunch of different ways too. If you're constantly talking about quitting and going back to smoking a couple days later, when you start a quit campaign your friends might sort of laugh and say "Yeah we've heard this one before." If you last a couple weeks it becomes real, and everyone starts to get in on it. Positive reinforcement goes a long way, and hearing your friends say "Wow man, I can't believe you've made it this far without a cig, keep it up" brings other people into it and makes you feel like you're letting them down if you slip up.

Good luck my friENT, and let me know if you have any questions.