How do you give a good presentation? 
 There are several things you should think about if you'd like to give a good presentation.

1. Know your audience. If you use jargon or reference concepts that your audience doesn't understand, you may lose your audience's attention.
2. Pay attention to how your audience is reacting. Do they appear bored? Do they look confused? You can and should make adjustments to what you're presenting based on this real-time feedback.
3. Communicate clearly. You should make a deliberate attempt to speak clearly, and at a reasonable pace. You can think of an orator you admire, and channel their communication style.
4. Practice, practice, practice. Practicing the presentation beforehand can help your confidence. Even if you're extremely nervous, if you know the content of the presentation you're going to have more confidence than otherwise. Additionally, not having to spend as much conscious effort thinking about what content you need to say allows for more of your attention to be spent on some of the above suggestions, like ensuring you are communicating clearly and paying attention to your audience.

Through knowing your audience, paying attention to their reactions, communicating clearly and practicing, you can significantly increase your chances of giving a good presentation.