Feel free to spin in your chair while you wait A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Generating witty text... Test, test, and test again! Make sure your email looks good on all devices before you send it out. Fighting off robots… Don’t forget to add a fun, relevant call-to-action button to your email. Avoid getting marked as spam! Only email people who have agreed to receive emails from you. Keep your email subject line short and attention-grabbing.