Here are ten tips for writing effective emails. 1. Write a meaningful subject line. 2. Keep the message focused and readable. 3. Avoid attachments. 4. Identify yourself clearly. 5. Be kind -- don't flame. 6. Proofread. 7. Don't assume privacy. 8. Distinguish between formal and informal situations. 9. Respond Promptly. 10. Show Respect and Restraint.