Sit up straight. Get creative with emojis in email subject lines to increase open rates! Boost your email opens with a punchy subject line. Feel free to spin in your chair while you wait I wish I looked as good as you while waiting [insert fun loading text here] Don’t forget to add a fun, relevant call-to-action button to your email. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!