OK, since you ask I will offer my suggestion for what I have found to be the most effective training program that I have found. It is also, the most absolutely non-commercial group that you could find - if you could find it. It doesn't use any cool gadgets or tapes and it does require real focus and determination over years, but the rewards are, to my mind, unquestionably worth it.
If you are driven by an unquenchable thirst for self-knowledge and a keen desire to be of service to the world, then investigate the Arcane School:
http://www.arcaneschool.org/arcane/
You will not be pursued as a customer. There is no marketing. There are no false-claims or promises of any sort.
This is not something that I just found - I have extensive years of experience with the school.
