It is made specifically to bring out the sounds that trigger the brain into a peaceful and relaxed state of mind.
Nothing takes away sleep quickly like discomfort. To achieve stillness that eventually transcends into slumber, one needs to be lying on a comfortable surface.
Clutter sometimes almost has a voice. The busier your sleep environment is, the more your mind is dancing to that tune.
A bedtime routine indeed ushers it into crash mode at specific set times, so that means wherever you are capable of calling it a night and have a snug sleep.
Afternoon
7:00 PM
Putting up blackout curtains ensures that your sleep or rather attempts at it are not interrupted by headlights in your street or anything that could take away the dimness necessary to fall asleep.
Everyone loves a good shot of caffeine as much as the next person, but timing when to have it if you are dealing with irregular sleeping patterns.
Evening
If possible, switch off your phone as this is the number one culprit in this day and age that harbors the blue light. TVs are also significant players in this and should be avoided as much as possible at bedtime.