"Is Christmas Day a good idea? " - Yes it is
"I always needed loads more that day." - I tend to smoke less on days like that - too busy to go outside for one
" Plus if you've got New Year's Eve plans to go out you might slide." - no plans - at home as usual
"Personally I'd recommend quitting at a totally ordinary day that you decide on and prepare for for a few weeks." - yes been preparing for weeks
"
Each fag you smoke before then, have a good think about it, is it worth it, etc. then just go for it at a time when you've got nothing to give you an excuse to slide! "
Already do - I've got plenty of excuses to let it slide - and can't see them disappearing any time soon - so Christmas Day it is (well Boxing Day as I'll smoke on Christmas Day).