Sarah Silverman

And then before going back for my sophomore year, I decided to change my major to arts and sciences, and my dad cut a deal with me: He said if I’d quit school he’d pay my rent for the next three years, as if I were in school.

– Sarah Silverman

Run focus groups. Do whatever you need to do to get 8 to 10 people together in a room and put your product in front of them. Ask them how much they would pay for it and whether they would pay for it. It’s really important to get user validation early and often.