Good luck to you. As an incentive, just think of the money you're saving and the years you're adding to your life. Not to mention that you won't look ten years older than you really are and that you won't smell like old, stale tobacco. And you'll be free. No more "gotta have a smoke" and have to run outside.
I've never smoked, so I don't know any of this first hand, but I've known many people who've been through this.
Eric