The foundation for infinite survival sounds a lot better than it is, but is still a good reference. And now for a bunch of martial arts links, mostly aikido, because I like the idea of a completely defensive martial art. Here, here, here, here, here, and here are a lot of links. Bear in mind that this does not mean I know the first thing about martial arts, just that I have an interest in aikido, and plan to take it as soon as I become disciplined enough to believe I'll go. On a related, but much more fun to do with a partner, note...the backrub faq.