Don’t forget to add a fun, relevant call-to-action button to your email. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! 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 Let your imagination run wild. Try different email subject line styles to find what gets the most opens. Fighting off robots… Don’t forget to add a short preview description to encourage people to click on your email.