Don’t forget to add a fun, relevant call-to-action button to your email. Get creative with emojis in email subject lines to increase open rates! Sit up straight. Not just a pretty interface Try different email subject line styles to find what gets the most opens. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Fighting off robots… 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!