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It's best to have a plan for how you will introduce yourself so you don't get lost or confused when you're on stage. It's even better if you can write your plan down so you can review it beforehand or refer to it during your presentation. You can write down every sentence if you'd like, especially for practicing the introduction. When it's time to present, it's probably best to just write down a few notes or key words to remind you of what you want to say so you don't just read off your note cards. Practicing your introduction out loud will help you speak with the right intonation and at the right pace so your message will be clear and interesting. You can also time yourself and add or remove certain parts of your introduction until you've got it just right. Ask your friend for constructive feedback and advice on how to improve. Practicing out loud will also help you gain confidence. If you don't have a friend to watch your presentation, record yourself on video and play it back later to refine your presentation skills. It can be uncomfortable to watch yourself on video, but it will help you nail your introduction. You can even record your whole presentation. Keep recording and re-recording until you are happy with it. Then you know the audience will be happy too. You will want to make a good first impression with your introduction, so be sure you know what is expected of you and what might be frowned upon. Research the local culture where you will be speaking: what do they normally wear in the industry there? Do they introduce themselves by first name only, or with their first and last name? Be mindful of international customs too. In some places, it's not appropriate to use humor. If you are unsure about your audience, leave the humor out. The best resource to learn about the local culture is the locals themselves. If you have a contact where you will be speaking, ask them about customs, dress code, and how humor is usually received. If you don't know anyone personally, try searching in industry-specific online forums. Find YouTube videos of presentations given in the area that are relevant to your industry.
Make a plan and write it down. Rehearse your introduction with a friend. Research the culture where you will present so you don't offend anyone.