After trying umpteen times and failing miserably the first time I went into a pub or did some writing (when you stop to think you light up - at least I did), I followed the late Willie Rushton's advice and carried a pack of 20 and a lighter around with me. The logic was if you have no fags you've not given up, you're just out of fags. If you could smoke at any time then you are consciously deciding not to smoke and are not tempted when suddenly you're offered a fag. Worked for me 20 odd years ago but evidently I was hell to live with for a couple of weeks.

All the best

oggie