I quit many times as well.

Four motivators....
1. I worked with a woman whose husband was a surgeon and she knew I wanted to quit. She brought in photos of lungs from surgeries where lungs had been removed and autopsies from smokers. It was so disgusting, I quit that day. Honestly, it was just horrific. I'll find some and send them if you want.

2. You stink and so do your clothes. Think about what your hair smells like and your clothes and home smell like. Offensive to others but most are too gracious too say anything. Think about when people hug you, how your hair smells. WHen you are kissed what you smell like.
My best friends home stinks and she asked me if it did, I was honest and said yes. It wasn't until she quit, 6 months later she said she couldn't believe how bad it smelled, not to mention staining walls and smell getting into furniture, drapes and rugs. Your car stinks too.

3. Lung cancer is a terrible illness to deal with and an awful way to go.

4. The people who love you don't want you to smoke. Do it for them.