Reese Witherspoon says being anxious was her biggest career advantage

But now that she's getting older, Reese Witherspoon says she's learning to slow down and be content with what she's already achieved.
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What it's really like to work for a billionaire

Read on to get the inside scoop on what it's really like to work for 14 of the world's most successful billionaires ... Bezos has a knack for getting the best out of the people working for him.