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When speaking in public, make sure that what you have to say is engaging, otherwise you risk boring the crowd. Regardless of what you have to say, it will not go over well if it is boring. Practice your speech on people you know to see how the message you are giving is being received. Know your speech through and through. Once your speech is in your memory, you can then work on delivering it. Having your speech memorized in advance also gives you a chance to ad lib comfortably on the stage. Understand the material thoroughly.