"I have not failed. I've just found 10,000 ways that won't work."

- Thomas A. Edison

"Being busy does not always mean real work. The object of all work is production or accomplishment and to either of these ends there must be forethought, system, planning, intelligence, and honest purpose, as well as perspiration. Seeming to do is not doing."

- Thomas A. Edison
None. Well, one: You do need to be over 18 years of age, reside in the U.S., and have a pulse. But that's about it. There is no qualifying, physical exam, IQ test, beauty contest, or credit check!