Have never smoked myself other than the occasional cigarillo as a teen. My dad used to be a very heavy smoker though, in common with most guys his generation until around 35 years ago. Stopped after seeing a TV documentary where they disected a heavy smoker's lung and the black gunk oozed out. Freaked him out (as it did me too) and he's never touched them since. First year was the worst I understand but these days he can't stand the smell of the stuff or being near smokers.
Good luck to anyone on the board who is currently working to quit. JohnS's point that you can spend the savings on jazz LPs/CDs is a great incentive, I would think.