Sources | Medically Reviewed on 11/06/2019 Reviewed by Carol DerSarkissian on November 06, 2019

IMAGES PROVIDED BY:

1) Thinkstock

2) Thinkstock

3) Thinkstock

4) Thinkstock

5) Thinkstock

6) Thinkstock

7) Thinkstock

8) Thinkstock

9) Thinkstock

10) Thinkstock

11) Getty

12) Thinkstock

13) Thinkstock

14) Thinkstock

15) Getty

16) Getty

SOURCES:

Harvard Medical School Division of Sleep Medicine: “Sleep, Learning, and Memory,” “Sleep and Disease Risk,” “Sleep, Performance, and Public Safety,” “Twelve Simple Tips to Improve Your Sleep,” “Address Your Sleep Issues.”

John Hopkins Medicine: “Melatonin for Sleep: Does It Work?”

National Sleep Foundation: “Insomnia,” “A great night's sleep can depend on the visual conditions in your bedroom environment,” “Surprising ways a quick snooze is good for you,” “Caffeine and Sleep.”