Don’t forget to add a fun, relevant call-to-action button to your email. Boost your email opens with a punchy subject line. Don’t make ‘em yawn! Keep your emails exciting and brief. One Mississippi, two Mississippi… Test, test, and test again! Make sure your email looks good on all devices before you send it out. Generating witty text... Sit up straight. Try different email subject line styles to find what gets the most opens.