Don’t forget to add a short preview description to encourage people to click on your email. I’m worth the wait Get creative with emojis in email subject lines to increase open rates! Don’t make ‘em yawn! Keep your emails exciting and brief. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Feel free to spin in your chair while you wait One Mississippi, two Mississippi… Boost your email opens with a punchy subject line.