Try different email subject line styles to find what gets the most opens. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Want the loading time to be longer so we can spend more time together :) Get creative with emojis in email subject lines to increase open rates! [insert fun loading text here] One Mississippi, two Mississippi… Not just a pretty interface Don’t forget to add a fun, relevant call-to-action button to your email.