Stay relaxed.
Similar to the aforementioned note on overcoming your anxieties, if you’re uptight, stressed, or look nervous, you won’t perform as eloquently. Do what is necessary in order for you to relax, whether it be imagining your audience in their underwear or simply remembering that the worst thing that could happen is that your audience gets bored (which really isn’t that bad at all). Speaking should come naturally, not feel forced, so let the words flow and don’t worry too much about how to say them or what people are thinking of you.