51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! One Mississippi, two Mississippi… Sit up straight. Avoid getting marked as spam! Only email people who have agreed to receive emails from you. Don’t forget to add a short preview description to encourage people to click on your email. Fighting off robots… 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.