I had the privilege of meeting Fred Miller when he spoke at a National Collegiate Conference for the Association of Information Technology Professionals. He had just written his first book, No Sweat Public Speaking!. From his website (https://nosweatpublicspeaking.com/) I see that he has written a few more: No Sweat Elevator Speech!, No Sweat! The Fear of Public Speaking. He emphasized keeping slides simple. He also showed how inserting a blank screen can immediately draw the attention back to the speaker.
I would recommend grabbing a copy of one of his books, or better yet; go and see him in person if he is presenting at any conferences you are attending. At the very least, follow him on Twitter, and catch his videos on his website and YouTube Channel.
Check out his free speaker’s template mindmap.
Check out his free template for creating an Elevator Speech.