I learned when and how to give feedback both positive and not so positive.

I learned how to respond to criticism.

Take time to listen, focus on what is being spoken.  Slow thoughtful process is good.

I learned a few new things about creating presentations and the use of visual aides or slides.

Always know your Purpose, Objective, and goal this will help your presentation more clearly. Get to know your audience and don't assume they already know you introduce yourself and what you are presenting. Practice to calm your nervous system and to make sure you are ready to present to make sure it's finished and ready. Dress professional so the audience don't assume you're not professional.

To make your employees know what you're talking about rather than leading them on for two or three sentence make it your first sentence to make them clear on what you are talking about make it clear and make sure there are no spelling errors.