How to do public presentations?

There is no unique formula for a succesful presentation, there are some recommendations that are effective. Any executive or any person shall be liable to face the public and that can produce success and recognition as a professional, business men or student.

Some useful steps to do a good presentation are:

1. Prepare the conference selecting the most important information and find out about the latest developments. 
2. Introduce yourself,, but do it in 25 or 30 seconds, without exaggeration and without arrogance.
3. Explain very briefly how it will develop the conference and how long.
4. Use aid, like videos, impressions, etc.
5. It is important to have the attention of the audience. Find real life examples, anecdotes, jokes or double-meaning, use terms easy to understand. A characteristic of the good speakers is: they make a pause in the key moments of the presentation.  
6. Look to the public, don't focus exclusive in the documents at hand or make the mistake of sticking to the images on the projector.
7. Inspire confidence and project animation.  
8. Interact. Ask if there is all clear, and make brief conclusions.
9. When finished, do not just say thank you very much. Made a courtesy thank you all,  make available material and provide basic information such as your e-mail, website or blog.
10. At the end, try to feedback and improve the error made in the last presentations.

So as a conclusion, I think a good public presentation depends in the confidence and hability of the speaker. He has to attract the attention of the audience and algo seems nice. He also has to avoid boring the audience and make the presentation the more funny (depending on the topic) and interesting he can.