For what it's worth, this is how I did it:
Get rid of EVERYTHING in the house, car, shed etc that involves smoking. Ashtrays, lighters, matches and yes, that pack of 5 you will keep under the sink for emergencies?
Run them under the tap! All tobacco paraphernalia MUST go.
Start saying and repeating "No thanks, I don't smoke".
Stay busy. Bored for 10 minutes? Go for a walk.
Hands fidgety? Get a fake cigarette, Rubik's cube or even a stress ball.
Small steps. Get to 5 hours. Another 5 and you're in double figures. Well done!
Now aim for a full 24. Keep praising yourself, you can do this. Plenty of mints and gum at hand, sugar free of course. Change your habits. Used to have a fag before bed? Have an apple instead. Note how good it tastes now you're a non-smoker.
Now you're aiming for 3 days. No, scrub that, aim for 50 hours, then we'll get to 3 days.
Colleague in work wants to go for a quick drag, needs someone to go too. "Sorry, I don't smoke any more".
That's the spirit!
3 days has gone by, now aiming for 5. Get to 7 and that's a full weak! With the money you've saved, spend it on a treat for yourself. CD, bottle of wine, whatever.
Now your'e aiming for 10, you're now a fully committed non-smoker.
Well done, keep it up!
OK, a bit cheesy but that's the mantra, you WILL get there. People will give you a second glance as you pass because you no longer have that awful smell, will engage you in conversation without turning away too.
Give it a go, there can only be benefits, there's no downside to packing in.