Probably all of the above applies, so first of all good luck with it, at least you have thought about it! unfortunately it doesn't mean you made up your mind, if you have been trying to quit before and it didn't work!
Maybe try to think now what is that you like/dislike about smoking. Do a list, be honest with yourself. If you have more stuff on the like side, you don't want to quit. If there's more on the dislike part, then good for you!
Many people say that you can't stop quitting slowly. You just need to put it down for once and forever. And the other thing I heard was that it's not the nicotine that is missing for you, but the actual movement of the 'taking out the cigarette of the box, put it in your mouth, and then light it up'. So yes, you will need to find something to keep your fingers busy.
there is one more thing, you can try alternative treatments, like hypnosis. It works for some people, they get hypnotised, and the guy tells them how bad is smoking, and they can't stand the smell of cigarettes etc.
I've heard of a person who puts a bag over your head that has old cigarettes and ashes in it, and you need to breath that stinky air for god knows how long, and when you finally get a bit of fresh air, you wouldn't wanna smoke again. :)
Good luck, and don't try this last one at home alone! :))