I'd also definitely recommend Allan Carr's Book - "The easy way to stop smoking" - It's completely different to anything else and the only thing that worked for me... Just so 'common sensical' you just can't not quit after reading it... Give it a go, it will expel alot of the myths we've all heard about/experienced quitting, I promise it will make it easier, even the mood swings, you'll understand after you've read the book