you know the feeling: You're in bed by 11, ready to catch a solid eight hours before the alarm snaps you awake. But instead of heavy eyelids, you're staring straight at the ceiling, too energized to lie still. Sound familiar? Next time, fire up some sleep music on Spotify as you're going through your bedtime routine—specifically, songs that have between 60 and 80 beats per minute, the ideal number to reach relaxation zone, says the Canadian Association of Occupational Therapists.