Ask HN: How did you quit smoking?

I know this is a little off the topic of how to make a great start-up but I figure it's on-topic for mutual support and for an issue that prbly effects many of us stressed out types. How did you quit smoking and is it a complete fantasy to imagine getting it down to like, 7 or fewer per week when starting from an accidental habit (roughly half-pack / day, in my case).