A good way to start is reading Andreas Moritz book

Timeless Secrets of Health and Rejuvenation. There is an index on the first page of his website http://www.ener-chi.com
Everyhting is mainly based on cleanses (all in the book) and the right food and lifestyle. He also gives his view on supplements etc.
If you don't want to spend the money, read his website and read all his archived messages.
That is how I started and then I started reading other forums like oil swishing, urine therapy, oxygen and alkalizing.
The liverflushing got rid off my allergies.