Don’t forget to add a fun, relevant call-to-action button to your email. I’m worth the wait We’re very font of you because you’re our type. Opening the door to unlimited creativity… Don’t make ‘em yawn! Keep your emails exciting and brief. Keep your email subject line short and attention-grabbing. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Don’t forget to add a short preview description to encourage people to click on your email.