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Sleep deprivation can make it a lot harder to prevent your body from shaking. Try to get to bed around the same time every night. Get at least seven hours of sleep if you are an adult, and at least 9 if you are a teenager. If you only practice speaking when you're alone, you're more likely to get anxious when you deliver the speech to an audience. Get as many sessions in as you can in front of friends, family, colleagues, and small groups. Practice a little every day, but on the night before you deliver the speech, don't practice. Just relax. If you notice that there's a section of the speech that makes you the most nervous, practice it extra. For instance, if you always get nervous right at the beginning, devote extra practice time to the beginning. If you can, spend some time in the place you will give your speech. Practice there if you can. If the location is in your workplace or school, visit it frequently to practice. Relax there as well. If the location won't be accessible until the day of the speech, try to come a little early so you can acclimate to the environment. In the days before the speech, and on the day itself, avoid stressors. Don't talk to anyone who makes you anxious. Take some "me time" every day to do things that relax you, like taking a hot bath, reading a book, or watching a comedy. Running and other forms of vigorous movement can use up your extra adrenaline. Try taking a jog, going for a rapid bike ride, or even dancing out your nerves on the morning before you present. If you can't do something vigorous, take a brisk walk instead. Write down what makes you nervous about a speech. Consider each of them individually. What's the worst that could happen in each case? If it happens, what will you do? For instance, if you're scared that you'll forget what to say next, think, "I'll just pause and look at my notes." This technique may not work if you are prone to catastrophic thinking. If you are someone who tends to worry about the worst case scenario, don't try this method. Generally speaking, caffeine is not bad for anxiety. It can even have a positive effect. However, if you consume an excess amount, over 300 mg in a day, it can make you shake. Limit yourself to one or two cups.
Get a full night's sleep. Practice in front of others. Visit the location of your speech. Focus on relaxing. Exercise before a speech. List the things that you're afraid of. Moderate your caffeine consumption.