You shouldnt use anything. If you want to quit, you just quit. Its all about your mind. If you really want to, then its possible. You dont need products, gum or patches or something, it isnt working anyway, its just a mind thing.
You should smoke your last cigarette in the evening, before going to bed. Next morning its over. Than, start with a good healthy breakfast, when you wake up. Of course you will feel pretty ty in the beginning. But when you do, just grab some nuts or gum or chips or something to chew on.
Just so you are doing something. Because missing smoking is also about that now you miss doing something all the time.
After a week or two, you will feel more comfortable and then when you smell other people smoking, you will eventually find it disgusting and your need to smoke will decrease.