Do you function well on six hours of sleep? What's your ideal amount of sleep?

Does your sleep schedule change much from week days to weekends?

How have your sleeping habits changed as you've gotten older?

What do you do when you have trouble sleeping?

Is there anything you avoid before bedtime to sleep better?

Do you prefer sleeping in a completely dark room or with some light?

Happiness consists of getting enough sleep. Just that, nothing more. — Robert A. Heinlein. What are your thoughts on this quote?