It means looking prospective employees in the eyes and convincing them to leave safe jobs, quit everything and throw their lot in with you. It means having pundits in the press and blogs who’ve never built anything criticize you and armchair quarterback your every mistake. It means lying awake at night worrying about running out of cash and having a constant knot in your stomach during the day fearing you’ll disappoint the few people who believed in you and validate your smug doubters.