1. Personalization: Use the subscriber’s name and tailor the content to their interests. 2. Timing: Ensure your emails are sent at the right time based on your audience’s behavior. 3. Testing: Regularly test different elements of your emails, such as subject lines and call-to-action buttons, to optimize performance. 4. Compliance: Make sure your emails comply with regulations like GDPR and CAN-SPAM. 5. Monitoring and Adjusting: Continuously monitor your campaigns and make adjustments as needed based on performance data.