Ive been off cigarettes for quite a while now... probably 15 years or more. Sometimes Im driving down the street, and I can smell the tobacco smoke coming from the car in front of me. Sometimes, just sometimes, I think damn, that smells good, I could use a cigarette. But I dont obsess on it, and let the craving pass.
You really just have to be comitted to not smoking in the present. Forget about tomorrow or a week from now, or a month from now. That makes it very difficult. When cravings present themselves, and they may well do that, just remind yourself of the reasons you're quitting. Find a positive way to distract yourself. Get thru that moment of craving, and when the craving is over, as it certainly will be, you're still a non-smoker.
Above all, if you find yourself with a lit cigarette in your mouth, smoked halfway down to the filter, before you realize what your'e doing, don't use that as an excuse to go back to it. You''re still quitting. You just had a moment's weakness. Few things worth doing happen quickly and easily. Quitting is a process. Easy for some, difficult for others but doable for anybodyd who truly chooses to do it.
When I was quitting smoking I had to quit drinking. I swear I'd be having a few drinks in a bar, and all of a sudden, I''e realize that I was smoking a cigarette. It was like somebody hit me over the head, knocked me out, lit a smoke, put it in my hand, and had me smoke it. Alcohol acts on the part of your brain that keeps you from doing things you wouldn't normally. I''m guessing you're familiar with that concept.
Anyhow, best of luck to you. You can do it!