1. Create a Test Plan: Identify the key email clients and devices your audience uses. 2. Use Testing Tools: Utilize tools like [_Litmus_] or [_Email on Acid_] to preview your email. 3. Check for Rendering Issues: Look out for broken layouts, fonts not displaying correctly, and images not loading. 4. Test Functional Elements: Make sure all links, buttons, and forms work as intended. 5. Review and Iterate: Based on the test results, make necessary adjustments and test again.