I quit 20 years ago, cold turkey which stuck after several tries. I read a book...I think it's the same one mentioned here...that basically said not to tell yourself "I can't smoke" but "I choose not to smoke". That's what worked for me. I won't say it was easy, and there's still times I remember how enjoyable it was but the cost to your health and pocket is just not worth it. Not to mention there's hardly anywhere legally left to smoke in public these days (in Australia at least).