boost confidence

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That Genius Maid-of-Honor Speech
Channel a moment in your life when you felt genuinely powerful (you tamed a tough crowd, charmed your first clients, gave birth). Write about it for 10 minutes. If you're like the volunteers in a study published in the Journal of Experimental Social Psychology, this exercise will make you feel (and come across as) noticeably more confident. And not in a cocky way: "Power-primed" people were simply more persuasive and impressive than usual in written essays and face-to-face mock business-school interviews. (They were also 81 percent likelier to receive a thumbs-up.)