Don’t forget to add a fun, relevant call-to-action button to your email. Get creative with emojis in email subject lines to increase open rates! Feel free to spin in your chair while you wait Opening the door to unlimited creativity… Generating witty text... Keep your email subject line short and attention-grabbing. 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!