Five rules I got from the video,First, treat your audience as king. Second, spread ideas and move people. Third, help them see what you're saying. Fourth, practice design not decoration. Fifth, cultivate healthy relationships.I think the most important rule is to help them understand what you are talking about. If they can't understand what you are talking about, it will be difficult to understand what you are talking about. They will not only feel bored, but also won't listen carefully at all. So I think this rule is the most important.