Organize your main point and supporting points so that your audience can follow you. Your supporting points could be examples which illustrate your main point or reasons why your main point is true or points that explain your main point. Your supporting points could also be other Scriptures on the same topic.
In Matt. 6:25-34, Jesus teaches about worrying. He states his main point at the beginning, supports it, then states his main point again at the end. The repetition helps the audience to remember his main point.
In 6:1, he states his main point, then supports it in 6:2-18 with 3 examples. Three supporting points are usually sufficient for an audience. You can add more if necessary. For example, in 5:17-20, Jesus makes his main point, then in 5:21-48, he lists 5 supporting points or examples. If you are going to use bullet points (that is, you will say “Example 1…Example 2, etc.”) it is often good to let the audience know ahead of time how many points you will have. That way they know when you are coming to the end and also know if they missed a supporting point.