Well on the 16th of July 2008 I got involved in a thread about smoking on a now defunct Martial Arts web forum. I made a comment about it being a little like high altitude training as you have less oxygen in your system and a guy that went by the name of Mule picked me up on that. Reading back what I had posted made me realise that I was basically an addict in denial and I didn't like that. I resolved to do something about it and planned a quit day a few days hence. However at lunch time on the 17th I started the final cigarette in the packet I'd opened the previous day; as I stubbed it out I decided that I didn't want to buy any more and that was it. Now 5 years on I don't miss them at all and not one single puff has passed my lips in that time.
This forum helped tremendously as did the links in my signature, learning to let go of the idea of smoking being a pleasure or reward worked along with an understanding how the addiction/compulsion takes hold of you.
These days I'm free and loving it.