Keep your email subject line short and attention-grabbing. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Try different email subject line styles to find what gets the most opens. One Mississippi, two Mississippi… [insert fun loading text here] Let your imagination run wild. 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!