If you want to get on board (as I was saying in the video below), here's a great place to start: you might have seen Wade Davis' great talk at TED Talks about endangered cultures. Now he's hosted a NatGeo special -- it aired tonight at 10:00, but I'm sure they'll re-air it. Here's a link to the program's website, which offers three 5-minute-ish videos.*
*Cf., on participatory anthropology, Michael Harner's The Way of the Shaman, Jeremy Narby's The Cosmic Serpent, and Carlos Castaneda's A Separate Reality.