Having been a compulsive quitter in the past (I quit 3 times in one day once don't ask), but at the same time an innovative thinker, I've tried every method out there, but the most success has been with my own methods.
But one method I have not tried, and it works in 'just about everything else' is teamwork. It would be nice to have a team of people trying to quit smoking, together. Strength in numbers. This is a method I have not tried because I'm not sure if it really exists. Yes there are some communities out there, but meh. People somewhat on my level, compared to randomers with the same goal, I think has more strength.
That's just a theory. But it works in everything else.
As for my method which was extremely successful (compared to my lack of success quitting); Basically I thought about what the truth was (the truth will set you free), but I'm also big on psychology too. Is addiction to smoking real, or is it more of a habitual addiction? Will you die if you don't smoke? Are most of the reactions when quitting, fear-based? Is fear a distortion of truth? Is fear an illusion? Is needing to smoke an illusion?
So my method, which crazily enough worked straight away was; before I sleep (which is an important time to reprogram yourself), I spent about 10 minutes visualising the next day, and visualising the truth. I wasn't addicted. I could see someone smoke and I wasn't addicted. I could see cigarettes and I wasn't addicted. I was free from smoking because, addiction is an illusion. I was free from the fear of quitting, because I remembered (reconstructed memory) that it was an illusion. I was free from smoking.
Sure enough, the next day, and every day I continued, I had zero feeling about needing to smoking, zero withdrawal symptoms.
This really worked for me, not sure what went wrong, something happened and then that impulsive, distorted illusion of cigarettes being the solution to calm down (when they actually break down our ability to 'deal' with stress) won. I may have thought hey everything is fine, and stopped my method before it was enough. How many days to create a new habit? It gets longer the older you get, an approximate would be your age in days. I quit for 20 days, which was a record for me (an impulsive smoker). Doesn't sound like much, but I believe others who used this method would be way more successful than me, since they don't have my issues. Most people are successful when they do things and follow it through, as when I start doing something I tend to sabotage myself, get bored, or have a short attention span to repetitive behaviour (even though smoking is a repetitive behaviour!) I think way too much compared to others. Thinking too much (not necessarily anxiety, just a complex weird brain), is a sure fire way to think also of the thoughts that can defeat you, but on a plus side, I'm excellent at problem solving.
All I can say is, don't knock any method until you have tried it, and I've tried every method out there (except teamwork which I believe would be the most successful).