THIS!
about 2 years ago my son was a few months from being born and i didn't want to expose him to it. I just quit. From one day to the next i went from a pack a day to nothing at all.
The first week absolutely sucked. They say it takes a week or two for the nicotine to completely leave your body, but i feel like i still crave it. The trick is to remember that YOU are in control. That YOU control what YOU do. 2 Years later i am happy i stopped. I would be lying if i said i didn't want one every now and then though.