A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. One Mississippi, two Mississippi… Generating witty text... Try different email subject line styles to find what gets the most opens. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Feel free to spin in your chair while you wait Keep an eye on your email open rate to analyze and improve performance! Sit up straight.