Use of pronouns: “we” to create a sense of unity, “them” for a common enemy, “you” if you’re reaching out to your audience, and “I” / “me” if you want to take control.
Jokes: Humour is powerful. Use it to perk up a sleepy audience, as well as a rhetorical tool. Laughter is based on people having sth. in common, shared assumptions – and can, therefore, be used to persuade.