By all means check out Winston, he's the master. Yes, you can find most of my rules elsewhere. But people don't know them. My student didn't. And my guess he picked up his bad habits listening to bad talks by clueless people. So these principles bear repeating.
Then, when I read the piece, most were already known to me.
One should watch the marvelous guide by Patrick Henty Winston- "How to Speak".
He also has a book called- "Make it Clear". I highly recommend this.