Start with http://en.wikipedia.org/wiki/Colorado_Experiment. Then read http://blog.legendarylife.com/the-colorado-experiment.

Anecdotally, here's one guy's attempt at repeating the Colorado experiment. http://www.placeintheground.com/2008/07/21/testing-out-the-c... http://www.placeintheground.com/2008/09/25/colorado-experime...

Re-reading this makes me think that Tim Ferriss is probably advocating the Colorado Experiment's methods in his book. One of the other comments mentioned five-seconds-up, five-seconds-down.