Let your imagination run wild. Get creative with emojis in email subject lines to increase open rates! A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Fighting off robots… [insert fun loading text here] 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Sit up straight. Avoid getting marked as spam! Only email people who have agreed to receive emails from you.