You have my support, Fiona. I haven't had a cigarette in more than 35 years, BUT I can attest that for close to 20 years after I quit, I still had powerful triggers that made me think about lighting up again. Thank goodness I didn't do that.
One "incentive" that worked for me was to put into a piggy bank DAILY the amouht of money I would have spent on cigarettes. It wasn't long before I had money for a trip, dinners out, new shoes, all manner of things that were previously not in my budget.
Just remember to take one day at a time, and not to beat yourself up when you fall off the wagon. Just climb right back on. Your health will improve, and that, hopefully, is a powerful incentive.