So many comments and noone referenced the ultimate article on sleep subject? http://www.supermemo.com/articles/sleep.htm http://www.supermemo.com/articles/sleep

So many comments and noone referenced the ultimate article on sleep subject? http://www.supermemo.com/articles/sleep.htm http://www.supermemo.com/articles/sleep.htm Read at least the first couple of pages before you start using any "pro tips" that can be found on the web. It's too easy to harm yourself, your productivity and learning ability.