"One hour's sleep before midnight is worth two after that time." ~ Robert E. Lee
"Go to Bed Early - One study suggests that the most creative part of our sleeping occurs in the first half of the night, during slow-wave sleep. So if you need an answer to a solution and are short on time, it's best to go to bed early and get up early, rather than to stay up late." ~ From the UK Times Online
Complete story here.
I think I'll go take a nap.