Rehearse out loud multiple times.
Explanation:
This is the best way to practice a speech. In order to make sure that you are well-prepared for your presentation, it is important that you practice your speech several times. This will bring several benefits to you. It will allow you to become more familiar with the material. It will also allow you to regulate your tone, volume and speed. Finally, it will most likely decrease your nervousness or anxiety by making you feel more prepared.