The Uberman Sleep Schedule consists of six 20-minute naps spaced evenly through the day. This is a total of two hours of sleep in a 24-hour period, and is generally believed to be the least amount of sleep you can get in 24 hours without being sleep deprived. While it provides the most extra time in a normal day, it is also one of the most difficult schedules to adapt.
Uberman is by far the most famous of the schedules, supposedly having been followed by Leonardo DaVinci, Thomas Edison, and more. Many of the other blogs you’ll find on the internet have begun or focused on Uberman.
Uberman is my schedule of choice, and so most of the posts about my experiences will be about Uberman.