I quit using an amazing and very simple method. I suffered no nicotine withdrawals, in fact no bother at all! I just didn't feel like smoking from one moment to the next! The method is called EFT and there's someone out there who offers free (donate if you want) email consultations. Here is the website:
info-santanyi.com/eftservice/eftforall.html

I hope it works for you as good as it did for me, best of luck!