Well the most powerful thing is your mind. If you make up your mind to stop, you can beat the withdrawls. If your mind is weak, it will find any dumb reasone to go back.
Also deep breathing. i do yoga/pranayama/meditation daily and find it very powerfull. This helps to keep your body and mind fit & centered. Also i took up jogging, and this has just been great to give you a natural high and keep the pounds off. You see, when most stop smoking their system slows down and they gain weight because of it. Not to mention they tend to eat more.
Anyyyyyyyyyyyyyyyyyyyway what ever the short term difficulties are the long term benifits are worth it a 1000 fold.
Be Well. Lance