I quit smoking on 16 January after smoking about 20 a day (30 towards the end) for about 16 years.
So far it has been surprisingly easy (something that I feel a tiny bit guilty about). I'm starting to feel even better than I felt right after having a fag (if that makes sense). This is rather surprising because I was one of those people who believed that I would never be happy unless I smoked.
My quit smoking method was: I took a day off work and read the Alan Carr book. After every chapter I went for a smoke break and thought about what he was saying. I would ask myself why I smoked and if I agreed with what he was saying.
Towards the end of the book I started to realise that I don't have to smoke. I can (and will be) happy without it. It was an amazing feeling.
I used the same 'critical thinking' approach through the craving phase. I never allowed the thought "I would love a cigarette" to stay unchallenged in my mind. While I couldn't stop myself from thinking it I could evaluate why I thought that I wanted one and challenge it. Then I would imagine that I just killed the nicotene monster with my fireball (yes, I play too much Skyrim :D).
I know I'm not completely out of the woods yet so I remain careful in case the monster catches me unaware.
Looking forward to joining all of you on this amazing journy to freedom!