It's the opposite of what you were taught. The best entrepreneurs — they let fires burn. Knowing which problems NOT to solve is as critical as knowing how to solve them. We're revisiting this episode with serial entrepreneur Selina Tobaccowala (Evite, SurveyMonkey, TicketMaster, Gixo) with the one thing that every entrepreneur needs to know right now: You have to conserve energy for the biggest blazes, and learn how to sleep easy while other fires smolder around you. Cameo appearances: Cheryl Kellond (Apostrophe, Inc.), Brian Chesky (Airbnb), Lisa Curtis (Kuli Kuli), Hadi Partovi (Code.org), Jerry Chen (Greylock Partners).