1. Clarify the theme: First, you need to clarify the theme of your paper. This will help you keep the consistency and coherence of your paper. All your opinions and arguments should revolve around this topic.

2. Make an outline: Before you start writing, making a detailed outline can help you organize your thoughts. The outline should include your main ideas and evidence or examples of how you intend to support them.

3. Use transitional words and phrases: Transitional words and phrases can help your readers understand the relationship between your opinions. For example, words like "however", "on the other hand" and "besides" can help your readers understand your ideas.

4. Keep consistent tone and tense: In your paper, you should keep consistent tone and tense. If you use the past tense in part of your paper, you should use the past tense in the whole paper.

5. Read and revise again and again: After you finish the first draft, you should take time to read and revise your paper again and again. This will help you find anything that may undermine the fluency and coherence of your paper.

6. Get feedback: It's also a good idea to let others read your paper and provide feedback. They may find problems that you haven't noticed.

7. Avoid long and complicated sentences: Long and complicated sentences may confuse your readers. Try to express your views in simple and clear sentences.

8. Use quotes and citations: If you quote other people's opinions or research, make sure you quote it correctly. This will not only avoid plagiarism, but also increase the credibility of your paper.