[JefeChulo]

I think you're asking more along the lines of how do you get people interested in what you have to say. Of course you could just look up public speaking techniques instead of asking here, which is why I assume that's not what you're asking.

In order to be a successful public speaker, you need credentials. You should start by having a good position in a successful company. This adds a lot to your credentials. You could also write research papers, or books. Have a successful blog, etc.