Don’t forget to add a fun, relevant call-to-action button to your email. Feel free to spin in your chair while you wait Let your imagination run wild. Get creative with emojis in email subject lines to increase open rates! A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Keep your email subject line short and attention-grabbing. My day’s been ok, how’s yours? Test, test, and test again! Make sure your email looks good on all devices before you send it out.