How do I become a better public speaker?

Practice voice exercises, breathing exercises.
Be sure to know what you are talking about and have it crystal clear inside your head.
Do public speaking. Doesn't it sound obvious? Practice leads to perfection on that matter (if there ever is perfection).
Rehearse the important parts of the presentation in order to be able to be authentic while also giving the information.

If you are scared to go on stage, than you should start with something like singing... You do it only to yourself and a selected few, until you feel more confortable to go on-stage. Another approach is to just go on-stage first to feel it and experience it, that alone should help you get more confortable. You see, it's not a hell to be there.

>>18589398
There unfortunately aren't many advanced strategies one can take to become a great public speaker. It's really just about practicing as much as possible and in front of large crowds.