Delivering an excellent presentation
If there is one thing that cannot happen in public speaking, it is the possibility of delivering a perfect presentation.
What would make your words or your manner of speaking perfect? Can you answer that honestly? Your presentation may be great; it may be excellent; it may be the best you have ever done; but, that doesn't make it perfect. Perfection is subjective in this particular venue. In fact, any live performance, be it music, theatre, or even in the sports arena cannot be judged by that one particular word - perfection.
You can type something perfectly; you can build a box perfectly square; and, you can copy a paper perfectly. But trying to accomplish perfection at a business lectern is a waste of time. Instead of trying to achieve something that is impossible, might I suggest you strive for excellence?