Well I don’t believe in the rules like “you have to sleep at least 8 hours”, I think it depends on the person and in the part of your life you are in. Some people are able to perform great 8 hours, other people 10 hours and other people 16 hours (like Jack Dorsey). Each one has to know himself/herself.

What I don’t understand is that if someone is about to faint because he didn’t sleep enough keeps working… Here is a quote that this article remind me of:

"Make rest a necessity, not an objective. Only rest long enough to gather strength." -- Jim Rohn