Some of the most convincing speeches were historic speeches, including Patrick Henry's "Liberty or Death" speech and Winston Churchill's "Their Finest Hour" speech. Persuasive speeches have several components that make them effective.
According to About.com, a convincing or persuasive speech is designed to convince the audience to agree with an idea or opinion that has been put forth. An effective convincing speech is one that is structured so that the speech provides a solution to a problem. For example, if a person were to write a speech about a lack of food, he would likely discuss several ways to acquire food.
The standard format for a convincing speech begins with an introduction with an effective hook. The hook of a speech is what gets the audience's attention and gets them to listen. The introduction is then followed by three main points. It is important to make the points brief and use them to help add substance to the opinion or idea brought forth. The final component of a convincing speech is a summary. This component quickly goes through the introduction and main points that were stated throughout the speech to give the listeners a reminder of everything that was just said.