The body has 90 minute sleep cycles and it's best to time it so you wake up at the beginning or end of one. Here's a sleep calculator that'll estimate it https://sleepcalculator.com/. Source: about 1 year ago

Ck out this site it takes anxiety out of I have to get up in x hours. It’s not how long you sleep but whether you get complete sleep cycles in. It helped me so much! https://sleepcalculator.com/. Source: about 1 year ago

Time bedtime for full sleep cycles - (This is the key) Sleep cycles are typically 90 minutes and if someone wakes up between sleep cycles instead of in the middle, they usually feel more rested. To test this, I timed my bedtime (using sleepcalculator.com) so that I'd be ending a sleep cycle around when my alarm goes off. I made a deal with myself that when my alarm goes off, I take a moment to check how I'm... Source: over 1 year ago

I use this sleep calculator.. You just put in when do you want to wake up and it will tell you when to go to sleep or when you go to sleep it will tell you best times to wake up... I dont realy check what the phases are I just tried this and it worked.. I didnt needed to know more . All I know that at beginning and the end you have very light sleep and you are gona wake up more rested then if you woke up in deep... Source: over 1 year ago

I use a sunrise alarm clock in combination with my phone alarm clock. Combine that with actually catching up on lost sleep by going to bed early for about a year, and using sleepcalculator.com to make sure I didn’t wake up in the middle of a REM cycle, I don’t have issues any more, even on days where I have to forgo 8 hours. Source: over 1 year ago

u/Usual_Farm7617 and u/SiriusFoot already posted my favorite YouTube docs, but if you want a wider selection you can check out https://topdocumentaryfilms.com/. It is a collection of free documentaries on a wide variety of topics. Somehow I still like those YouTube channels better, but its a good site to bookmark. Source: about 1 year ago

• Documentaries:(Find mostly on Hulu, Netflix, or Youtube). Fairly comprehensive list can be found here: http://topdocumentaryfilms.com and archive.org. Source: over 1 year ago

I don't have any off the top of my head but check out this site. Source: almost 2 years ago

Topdocumentaryfilms.com you can watch the best documentaries here. Source: about 2 years ago

• Documentaries:(Find mostly on Hulu, Netflix, or Youtube). Fairly comprehensive list can be found here: http://topdocumentaryfilms.com and archive.org. Source: over 2 years ago