With a Classic Structure
In a speech where you're trying to persuade someone, the classic structure is called "Problem-Solution." In the first part of your speech you say, " Here's a problem, here's why things are so terrible. " Then, in the second part of your speech you say, " Here's what we can do to make things better. " Sometimes it helps to persuade people if you have statistics or other facts in your speech. And sometimes you can persuade people by quoting someone else that the audience likes and respects.