20 Public Speaking Tips of the Best TED Talks

flickr: World Economic Forum
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Don't Do Your Prep Onstage

Don’t wait until you’re onstage to check your mic, your lighting, your remote, or your presentation. Do all that ahead of time. And if there are people running some of those functions, talk to them about what to do if something fails.
And if something does fail, smile and try to look confident while you (or others) take care of the problem. When things go wrong, what really matters is how you react.
Watch Sheryl Sandberg on women leaders.