So, in the interest of preparing for teaching a new course next year, and wanting to sort TED out a bit, I've created the following list based on disciplines (organizing knowledge or research by discipline is, it should be pointed out, in stark contrast to the real objective of TED Talks in general). I really like this TED fella, and I hope he doesn't mind:)
The best moments usually occur when a person's body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile. Optimal experience is thus something we make happen. (Csikszentmihalyi, 1990, p.3)