The Margin: World’s most successful people wake up at 4 a.m. — true or false or just plain annoying?

Are you a failure? Try waking up earlier, slacker. Like, 4 a.m., maybe. Apple’s Tim Cook, Starbucks’s Howard Schultz and Michelle Obama all apparently do it, so it must work, right? Wrong, if the reaction to a tweet from Inc. is any indication

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