This is good advice but doesn't work for people with sleep apnea. When I had sleep apnea I could fall asleep at any time of day, no matter how much sleep I got

This is good advice but doesn't work for people with sleep apnea. When I had sleep apnea I could fall asleep at any time of day, no matter how much sleep I got (or thought I was getting) each night. The alarm was necessary because I never felt well rested and couldn't get up without it. Then I went for a sleep study and was told that during a night of 6-7 hours of what I thought was continuous sleep, I actually woke up 120 times. Eek! Of course everyone normally wakes up at least a few times and doesn't remember it the next day, but most people don't choke and stop breathing 120 times a night. I rarely got any real deep sleep. I had sleep apnea surgery, which changed my life. Almost right away I got better sleep and was more alert during the day. It was like getting an extra 2-3 hours a day, every day. Now I get up without an alarm every day and never need caffeine. It's a great way to live.