Need a Nap? Sleep Like a Baby

Napping is a good idea, but afternoon slumber eludes many of us. Mental Floss offers some pointers for adults who have trouble snoozing while the sun shines.

Don't fight it: Humans are hardwired to hit the sack twice a day.
The optimal nap length is 20 or 90 minutes.
Sleep for longer than 45 minutes but less than 90 minutes and you're guaranteed to wake up groggy.
Lie down in the dark, and don't get too hot.
Consider a white-noise machine or its low-cost alternative: a fan.
If bedtime is soon, skip the nap.
Quit that time-consuming job that lacks siesta benefits.