I found that using the inhilator made teh difference for me. On my final and successful attempt then I also made a point of not avoiding the pub for the first month, as that's when your will power is at it's strongest, so delaying teh pub visits until when you're 'cocky' and think you're over the ciggies is a dangerous tactic.
Also, it's all a bit naff sounding, but the cessation clinic did help. OK, the sat around in a circle with a name badge on, and 'hello, my name's Duncan and I'm a smoker' won't be everyone's cup of tea. However, of the 16 there the first week, then well over half couldn't say the above without having to pause for a breath half way through, and that made me realise just how much I needed to quit.
My wife didn't quit until several months later, and not having both of us cranky at the same time was a good thing. Added to that, when we'd both given up before then as soon as one 'failed' then the other folded too.