What are the three points for good letter writing?

1. Be clear and concise. Your letter should be easy to understand and to the point. Avoid using jargon or technical terms that your reader may not be familiar with. Keep your sentences short and sweet, and don't be afraid to use bullet points or headings to make your points clear.

2. Be professional. Your letter should be well-written and free of errors. Use proper grammar and punctuation, and make sure your tone is professional and respectful. Avoid using slang or informal language, and be sure to proofread your letter carefully before sending it.

3. Be persuasive. The goal of your letter should be to persuade your reader to take a specific action. To do this, you need to make your case in a clear and compelling way. Provide evidence to support your claims, and be sure to address any objections your reader may have.