Some of the world’s most famous people have some pretty bad sleeping habits:

Marissa Mayer used to clock 130 hours per week at Google, slept at her desk and took “strategic” showers. (Huh?)

Martha Stewart only sleeps about four hours a night.

Thomas Edison only slept for three hours a night, and would reportedly work 72 hours straight.

Take control of your poor sleep habits with these nine tips from OPEN Forum.