My dad smoked for probably 55 years, mainly Camel non-filters. They're enough to make you dizzy. Although he never had cancer, I'm sure smoking contributed to the stroke that killed him in 1998.
I quit smoking cold turkey on New Year's Day, 1999 and haven't touched a cigarette since. I found that cold turkey was the best way for me. I had previously tried nicotine patches, hypnosis, etc.
Some of the things you have to do no matter what is ultimately successful for you is change some of the patterns in your life. I stopped going to bars, that was a trigger for me. It's not as much of a problem these days as many places are non-smoking.
Good luck to you. I hear smoking as more difficult to quit than heroin or cocaine. I understand the addiction of nicotine, believe me.
"Sometimes you can just smell a horrendously shitty day on the way, can't you? "
--Henry (Michael Keaton) in "The Paper."