I would agree that there are times when sheer willpower came in very handy during the early days of my quit but what I started with was an absolute and unwavering commitment to quit smoking. I focused my entire life for the next few weeks on changing the way I thought about smoking and developing a set of tools that would help me through the really challenging days (and there were plenty of those!). I read a lot of material on the subject and relied to a large degree on people from this forum for support throughout the first year of my quit.
You can't beat that combination; knowledge & support from those who gone through the same process!