Waldo:
Several things have helped me thus far, some of them are:
Start a list of the reasons why you want to quit, and add a picture next to your reason that will give you an image of what you put in writting i.e., if you wife is the reason, add a picture of her next to that reason. If it's the grand kids, add a picture of them, if it's a sickness you afraid of put a picture of a healthy person next to it. This way you have a mental image of why you are doing it, not just an idea as to why.
Other than the obvious reason (Family) for me quiting, is someone gave me the greatest give anyone could ever imagine. The owner of the company that I work for said that if I can stay off cigarettes for one year, that the company will pay for a 20 year, $1,000,000 term life insurance for me. To think that if something were to happen to me for the next 20 years, that my family would be taken care of is just incredible to me, Am I going to let my family down for a measly smoke that will probably take me away from them sooner anyways..... HELL NO!!! Even though the thought of my family being taken care of gives me some peace, it gives me greater peace knowing that there is a good chance that I won't need the insurance to take care of them, Because I'll be here to do it.