Ross Diedrich had gone pale and raw-boned. The CEO of a year-old startup in Denver, he'd stay at his office until the middle of the night, go home and sleep for about five hours, then chug a spinach smoothie and start again. He was just 27 years old, but he felt wrung out. Now he was standing in front of six angel investors, wearing a blazer over a T-shirt printed with the word covered—the name of his startup—and regretting he hadn't spent more time practicing for this moment.

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