[Arkady]

Easy for me to say, but I gave up Cold Turkey in 1998 (same week the Berlin Wall came down) my incentive was my (then) GF witholding Oral priveliges until she was convinced I'd quit!

I went onto six packets of Jaffa Cakes a day and couldn't go to the pub for six months (pint in left hand, ciggy in right - it just felt wrong holding a drink in the right hand...).
I then went onto running ten miles a day to work off the Jaffa Cakes.

If you can go for long walks as well, it'll really help the lungs recover faster. Boredom is the worst enemy - you feel bored and to fill the time, will want to smoke a fag. Try doing anything to fill your time - anything that doesn't involve just sitting still.
I also started making Airfix kits again, just to occupy my hands - had dozens of bloody Spitfires, Hurricanes and FW190's all over the place - went to great detail, finding original photos of real aircraft and re-creating them.
I even built a Huey Gunship with a "Rambo Combat Chopper" as the base and scratch-built all the internal cockpit detail using photos and drawings supplied by Bell Textron in Texas.

I'm not suggesting you go that far, but you'll need something...