When in doubt, slow down. On the day that you actually give your speech, dress carefully . You don't want to be wearing something too distracting, or too casual. Make sure that your hair and jewelry won't irritate you or be in your way while you are speaking. Don't worry if you are nervous .
Stage fright is a necessary ingredient of a good performance.
Make sure you have some water next to you when you give your speech . If nothing else, you can take sips of water to calm you down. Take some deep breaths. Check in with your audience. If your audience has stopped paying attention, don't just speed up to get it over with.