The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg
How to Get More REM Sleep
REM Sleep Disorder
REM Sleep - How Much Sleep Do You Need
Too much REM sleep: why do depressed people wake up exhausted? | Human Givens
"Get Quality and Sufficiently Long Deep Sleep" by Dr. Andrew Huberman
REM sleep vs. deep sleep and their importance for cardiovascular and emotional health | Matt Walker
How lack of sleep affects health and tips for a good night's rest
Sleep: What's REM Got to do With It
What Happens to Your Body on Little Sleep?
What causes insomnia? - Dan Kwartler
How much sleep do you really need? | Sleeping with Science, a TED series
Insomnia: why can't I sleep?
How Sleep Affects Your Brain
What's REM Sleep - How Much Do You Need?
Why you're still tired after getting 8 hours of sleep
REM Sleep behavior disorder
A walk through the stages of sleep | Sleeping with Science, a TED series
5 Tips For Deep Sleep
2-Minute Neuroscience: Sleep Paralysis