51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Keep your email subject line short and attention-grabbing. Opening the door to unlimited creativity… Time to get that bread. Don’t make ‘em yawn! Keep your emails exciting and brief. Fighting off robots… Don’t forget to add a short preview description to encourage people to click on your email. Don’t forget to add a fun, relevant call-to-action button to your email.