I quit about fifteen years ago, and in my experience there is no one single thing that will work. It took a multiple of changes being made to my daily habits. I'd also suggest putting the idea that there is quick approach aside ending an addiction as powerful as nicotine is not an overnight process. Many people myself included are almost blindsided by cravings long after we thought we'd overcome the addiction.
Here are two things that worked for me:
One; is physical exercise; something works your lungs. It felt terrible to begin with, but as I get in better shape, and farther away from the last smoke I found it helped me stay motivated to quit.
Two; keeping my hands busy was important early on. I had an advantage here, as I play music for a living and practicing involved my hands.

Good luck,
Phili