The average human takes 15 minutes to fall asleep. If you go to sleep right now, you should try to wake up at one of the following times:
6:54 PM
8:24 PM
9:54 PM
11:24 PM
12:54 AM
2:24 AM
If you wake up at one of these times, you’ll rise in between 90-minute sleep cycles. A good night’s sleep consists of 5-6 complete sleep cycles.