It is very important that you understand how Public Speaking works because it will help you prepare in advance and avoid the unnecessary distractions and unneeded expectations from the audience. After all it is the audience who are responsible for their own actions.
The first thing that I did was to stop spending money on my Public Speaking. I did not use my Public Speaking Training at all. My Public Speaking presentations were all about myself and how I was able to achieve success with my life.
More info here: https://brain-training.page.tl/Brain-Training.htm