Decide that you want to stop smoking, but don't make too big of a deal about it. Get into the mindset that if you desire a cigarette really badly and light up, it will not be the end of the world. It can be a lot of stress to quit smoking, and usually stress creates nicotine cravings. Stressing out about quitting can just make you want to smoke more. Plan to quit in a week or so as you follow the next few steps.
Organize some stress-busting sidelines to distract you from wanting to light up. Go and exercise, watch a favorite TV show, call a friend, workout in the gym, take the dog for a walk, etc.