Some people swear a productive day starts at 4 a.m. Others sleep on factory floors to ensure work gets done. The early-morning organization helps keep him productive throughout each day, he said. It's partially a privilege, Cuban admitted: He was initially attracted to entrepreneurship so he could control his own schedule. "The whole value of being in this position is just being able to control your time," Cuban, 65, said. But for Cuban, his schedule and communications are streamlined through his inbox, which helps him prepare for the day and cut down on unnecessary calls and emails, he said.

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Persons: Mark Cuban, Trevor Noah, It's, Cuban, Nicola Hughes Organizations: CNBC, Cuban