A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. 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 Generating witty text... Keep your email subject line short and attention-grabbing. Sit up straight. Time to get that bread. Test, test, and test again! Make sure your email looks good on all devices before you send it out.