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There are many ways to strike quickly and start with punch to make a strong initial connection with your audience. Conveniently, at least five proven ways to begin a talk form the acronym PUNCH: Personal, Unexpected, Novel, Challenging, and Humorous.
A presenter with good presence, just like a good conversationalist, will connect with you on some level. The speaker will demonstrate with sincerity that, at least for the moment, he or she does not wish to be anywhere else than right there having a dialogue with you.
The three things to consider when evaluating your own ability to project yourself to your audience aside from the content of the talk are: the way you look, the way you move, and the way you sound.