Subtitle is an important tool in paper writing, which can help the author to organize and present his ideas clearly. Here are some effective ways to use subheadings to organize the paper structure:

1. Determine the theme: First, you need to determine the theme or main points of your paper. This will help you choose the appropriate subtitle for each part.

2. Divide paragraphs: Divide your paper into several main parts, and each part should have a related subtitle. These parts can be introduction, text and conclusion, or more specific sub-topics.

3. Use a consistent format: Make sure your subtitles are in a consistent format. For example, you can use the same font size, style and color.

4. Concise and clear: the subtitle should be concise and clear, and accurately reflect the main content of this part. Avoid using words that are too complicated or vague.

5. Logical order: The subtitles should be arranged in logical order, so that readers can clearly see how your ideas develop.

6. Use hierarchical structure: For the part with multiple subheadings, you can use hierarchical subheadings. For example, the format of "I.A. 1" can be used to represent the first point of the first-level sub-theme.

7. Check coherence: Finally, make sure that your subtitle is coherent throughout the paper. This means that each subtitle should have a logical relationship with the previous one and the next one.

Through the above methods, you can effectively use subheadings to organize the structure of your paper, making it clearer, more organized and easier to understand.