How to Turn Your Bedroom Into A Sleep Cave
What You Should Try: You can still detect even a small amount of light—from your alarm clock or your neighbor's garage—through closed eyelids. Champion sleepers tell us they've noticed that when they make their room pitch-dark, they wake up feeling more refreshed than when it's just inky-dark.
Black Out: Opaque curtains or blackout shades can block light from outside, especially from the new headlights and street lamps that use energy-efficient LEDs, which produce light in the blue part of the spectrum—the most sleep-sabotaging of all. Inside the room, clocks with red numbers are less disruptive than ones with white or blue digits; turn yours so it's facing away from you.