One Mississippi, two Mississippi… 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Fighting off robots… 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. Is anyone even reading this? Don’t make ‘em yawn! Keep your emails exciting and brief. Don’t forget to add a fun, relevant call-to-action button to your email.