First, I want to say how wonderfully well you are doing! You've worked for it and you definitely deserve it!
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Now- step away from the cigarettes! You don't need them; get another hobby! Try knitting, origami, jewelry making, anything! As far as I know, none of these will give you cancer. Oh- and smoke in your mouth? Mouth cancer- my brother has a friend who lost part of his bottom jaw. I know it's hard, I smoked for years, quit 13 years ago for love.
I still want one every now and then, but I remember watching my father-in-law die of lung cancer 5 yrs ago, and lung cancer killed my Dad 2 months ago, so...
You've had such courage and strength so far. You have the motivation in a loving family. I am convinced that 2008 is your year!