I started smoking at 17 and around 23 I was smoking about 6+ cigs a day. My wife (also a smoker at the same rate) and I decided we would want to have kids and so we would need to quit smoking to let our bodies (hers in particular) cleanse before we started trying for a baby. We both quit cold turkey on the same day and that was the end of it. The more you hype yourself up about it and focus on it, the harder it will be. You just need some motivation and you'll forget all about it. If you have urges, just wait 10 minutes and they will go away.