You also have to know that you have to want to quit to make it happen. If you really don't want to quit then you're not going to be able to quit. Think of exactly why you want to quit and keep that in your mind and try and make sure you want to quit with every bit of your being. My teacher, who smoked for 30 years, quit in one day because she truly wanted to quit. She didn't use anything to help her and just stopped cold turkey and she hasn't smoked in a good 10 years.