Personally I am of the opposite opinion as mj, nicotine habbit is such an easy nut to crack, I already caught myself playing with it on purpose.
The question is: "What is the habbit ?" same as with many other things you can never get rid of that "click" your brain gives you when its remindet of nicotine or sth else. So you see a cig on TV or hear about it or smell one: "click!" and thats forever, in my experience so far. But shrugging when it goes "click" isnt hard at all.
Also I believe nicotine is THE QUICKEST habbit to get, and I am very experienced with another habit that many regard - lacking better knowledge or experience - as "the quickest developing habit".
But in my experience it is also the quickest and least withdrawal to end.
Just quit, exactly NOW, for people who have a hard time quitting, there is no such thing as "quitting when date / event / whatever is due" like "I quit after this pack" or "I quit on christmas". Its about taking whats left, throwing it away and not buying or accepting new ones. The symptoms will be very moderate and wont last very long. Remember: Even six months later you'll see someone having one and your brain gives you a poke, maybe you'll one day see it like me and make it all fun and games and eventually give in to that poke and one week later thats it for the next six months again, gives interesting insight into the mechanics of habits.
Last thing I see many people doing and I perceive as wrong: Wondering / thinking / asking "am I through yet". Its absolutely pointless, youre on or off, since: What would "being through" mean anyways ? That you can continue after a certain time without having a habit ? Thats paradox, why would you want to continue if its what you dont want and why would you want to loosen your self control (note: decisions arent a lack of control).
Lastly: Just keep in mind in a matter of a few days and a few packs the habit will form again, and also be gone again in just the same time and the same amount of saved packs. Also if you ever play with the idea of having a few more since by then you are confident of your "quitting capabilities": The first few kick and dont make the mistake to continue as you stopped, you'll be a tragic mess for a few hours
Oh and please note: This is highly personal, I do also currently not have any habit and I am absolutely confident, no matter what I do and how much fun I have, I womt develop a mew one (at least not one I can not simply get rid of again) and I do not have checked with others if they feel the same yet, so don't be disapointed if it doesnt work exactly the same for you, just put in more strength. I'm basically hoping I can come up with general advice that allows everyone to handle things as I do as I feel like its a great improvement to my life the way its now.