Don’t forget to add a short preview description to encourage people to click on your email. Get creative with emojis in email subject lines to increase open rates! Don’t forget to add a fun, relevant call-to-action button to your email. One Mississippi, two Mississippi… Boost your email opens with a punchy subject line. Time to get that bread. Sit up straight. Test, test, and test again! Make sure your email looks good on all devices before you send it out.