You won’t appear as so much of a threat, and they’ll eventually calm down.
This shows that you’re listening and really interested in what he/she is saying. It makes them feel validated. Obviously, you don’t want to overdo this.
When asking for a favor from someone, begin your request by saying “I need your help.” It greatly increases your chances of getting that favor done.
It is a small enough favor that they won’t say no, and it gets them to feel more comfortable with you.
This gets the other person to nod too, and they begin to subconsciously think they agree with you.
If someone is observing you, they will likely mimic you. Fold your arms, and see if they do it, too.
People like hearing their name. Plus, it helps you remember it.