Don’t forget to add a fun, relevant call-to-action button to your email. Get creative with emojis in email subject lines to increase open rates! I’m worth the wait Try different email subject line styles to find what gets the most opens. Time to get that bread. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Want the loading time to be longer so we can spend more time together :) Test, test, and test again! Make sure your email looks good on all devices before you send it out.