Don’t forget to add a fun, relevant call-to-action button to your email. Is anyone even reading this? Get creative with emojis in email subject lines to increase open rates! Try different email subject line styles to find what gets the most opens. One Mississippi, two Mississippi… Keep your email subject line short and attention-grabbing. I wish I looked as good as you while waiting 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!