I am bipolar, and have been managing my condition through medication and therapy. I have recently started some natural therapies in addition, with notable success. Here are some things I have added to my regimen:

1. Vitamin D
2. Omega-3 Fatty Acids
3. Meditation...
4. Light Therapy

There is a lot of info available, but be careful. Not all natural therapies are safe. Talk with your doctor about drug interactions. We would all do well to appreciate not just the importance of addressing physical pain, but psychological pain as well.

A great article with more info:
http://www.everydayhealth.com/bipolar-disorder/alternative-treatments-for-bipolar-disorder.aspx

Ash