Get creative with emojis in email subject lines to increase open rates! Generating witty text... Want the loading time to be longer so we can spend more time together :) One Mississippi, two Mississippi… Feel free to spin in your chair while you wait Don’t forget to add a fun, relevant call-to-action button to your email. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Sit up straight.