Fitness tip: Stand on the balls of your feet.

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Stand on the Balls of Your Feet
Simply shifting your weight to the balls of your feet will help you feel more grounded—whether you're having a tough conversation with a spouse or giving a presentation at work or a speech in front of an audience. Other tricks of the trade, according to Bill McGowan, CEO of the Clarity Media Group in New York City: "Pause to collect yourself before you start speaking. The wait will actually make you seem more sure of yourself," he says. Keep your pace even as you build to your point. And maintain eye contact. If that feels uncomfortable, look at an earring or a sideburn—the effect will be the same.