I haven’t mastered it by any means, but what I’ve found helps me feel less groggy in the mornings is arranging my sleep and wake times around my sleep cycle. Check out https://sleepyti.me. Source: 11 months ago

Use sleepyti.me to calculate when you should go to sleep so you can wake up between sleep cycles, you will feel much more rested. Source: about 1 year ago

On top of others' suggestions, try this: http://sleepyti.me/. Source: about 1 year ago

Napping in blocks actually isn't a bad sleep pattern if it works for you. I sleep in 2 3-hour blocks and sometimes an additional 2-hour nap, I can't sleep for more than 6 hours at a time, and usually not really more than 4. I was always exhausted. I use the sleepyti.me site to set my sleep cycles and wake up feeling refreshed. I too have about the same schedule (late night) I find sleep pretty interesting and... Source: about 1 year ago

Sleepytime Don’t know If this has been posted here before. But if you have issues waking up and still feeling tired, use this website. You can use it and put in what time you have to wake up or what time you have to go to sleep and it’ll give you all the times you can fall asleep in order to wake up well rested. It’s all done according to REM sleep patterns. I should use it more times than I do, but I usually... Source: over 1 year ago

Thanks, in general im using this handy alarm tool on my PC for reminders, saves a day :). Source: 11 months ago

Free Alarm Clock can do precisely that. I have been using it for a number of years. There is an install and a portable version on the site. The only thing that it cannot do is to switch the audio source for example if the audio output is set to front headphones, it cannot select rear audio output. Therefore if the front headphones are selected the audio plays through them and cannot be heard out loud. Source: over 1 year ago

Maybe set alarms on your phone or PC? I have this one on my PC which has been very useful at times. Https://freealarmapp.com/. Source: over 1 year ago