Most of us can give some sort of an opinion on whether we liked the speech or presentation we just heard, and what we liked / disliked. This sense can also be used on ourselves, whenever we prepare a speech, or want to improve.
Whenever possible, record your presentations and speeches. You can improve your speaking skills dramatically by watching yourself later, and then working on improving in areas that didn’t go well.
As you watch, notice any verbal stalls, such as “um” or “like.” Look at your body language: are you swaying, leaning on the podium, or leaning heavily on one leg? Are you looking at the audience? Did you smile? Did you speak clearly at all times?
Pay attention to your gestures. Do they appear natural or forced? Make sure that people can see them, especially if you’re standing behind a podium.
Last, look at how you handled interruptions, such as a sneeze or a question that you weren’t prepared for. Does your face show surprise, hesitation, or annoyance? If so, practice managing interruptions like these smoothly, so that you’re even better next time.