Don’t forget to add a short preview description to encourage people to click on your email. I wish I looked as good as you while waiting Get creative with emojis in email subject lines to increase open rates! 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! One Mississippi, two Mississippi… Test, test, and test again! Make sure your email looks good on all devices before you send it out. Fighting off robots… Don’t forget to add a fun, relevant call-to-action button to your email.