Generating witty text... Don’t forget to add a fun, relevant call-to-action button to your email. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. One Mississippi, two Mississippi… Avoid getting marked as spam! Only email people who have agreed to receive emails from you. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Not just a pretty interface Keep your email subject line short and attention-grabbing.