Sleep

How do you get quality sleep?
How many hours of sleep do you actually need?

Notes:
Stevenson, S. (2016). Sleep smarter: 21 essential strategies to sleep your way to a better body, better health, and bigger success. Rodale Books. 
https://www.cdc.gov/sleep/about_sleep/how_much_sleep.html
https://joycerey.com/blog/how-to-fall-asleep-more-quickly-the-healthy-way/