In a recent comment for one of the posts, a person mentions better results by using a combination of nicotine replacement therapies.  The public health guidelines also recognize this as more effective than just using a single type of medication like the patch, gum or lozenge.  The studies looked at people who used patches for continued supply of nicotine and gum when you're having a craving.  The results were very good. 

Although the FDA has not supported using multiple types of NRT, many doctors are starting to encourage people to do this.  Just make sure that you ask a doctor or a pharmacist about this.