A few articles to stoke the fire:   Five hours' sleep is enough, study finds     The Recommended Hours of Sleep     6 hours of sleep? It's not enough     Sleeping for less than six hours may cause early death, study finds     What say ye fellow asses? - i mean bums. How much do you need, and what have you read/heard of the Masters and high level practitioners?   Love, love, love.   Langster.