If your sleep is not deep enough, check out these expert-approved hacks for expert-approved guidance to restorative rest.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." So, what is the ideal temperature for sleep, exactly? Is it better to sleep in a warm or cool environment ...

Sleeping in a cold room helps your body produce the hormone melatonin, which promotes better sleep. Set your room temperature ...