Before your open your mouth, do your homework. Taking the time to think things through from your listeners’ point of view keeps you polite–and more persuasive.
Good manners are important for everyone in business, but they are essential to the success of presenters and public speakers. Why? Because civility is inherently persuasive.
When you treat your opponents with respect, you have a greater chance that they will listen and respond, instead of closing their minds and reacting.