Boost your email opens with a punchy subject line. Feel free to spin in your chair while you wait [insert fun loading text here] A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Test, test, and test again! Make sure your email looks good on all devices before you send it out. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Don’t forget to add a fun, relevant call-to-action button to your email. Sit up straight.