There is a pretty good permaculture video on YouTube (chopped into six parts). It is awesome and loaded with information.
Permaculture is a super way to grow a garden-- less effort and more yield. It's more a system design tool and almost a worldview. Nothing cultish, just common sense really. Very progressive stuff.
Here are the videos:
A plus: I won't tell you where, but you will come across hilarious 80's nerd rap about permaculture somewhere there.