What Do I Need to Do for BCBS of NJ PPO to Cover my Breast Reduction?

Based on your description you may be a good candidate for breast reduction surgery; for  physical and emotional reasons.
The best way to obtain insurance coverage for breast reduction surgery involves some “hoops” to jump through. The more documentation you have (for example, from your primary care doctor, physical therapist, chiropractor etc.) the better when it comes to obtaining insurance “authorization” for the procedure.
This documentation and letter/pictures from your plastic surgeon will help you obtain authorization. Make sure you're  working with a well-trained/experienced board-certified plastic surgeon.
Good luck!

Your best bet is to find a participating surgeon and go in for a consultation and have a predetermination of benefits letter composed to ascertain your level of coverage.