Get creative with emojis in email subject lines to increase open rates! Keep your email subject line short and attention-grabbing. [insert fun loading text here] Want the loading time to be longer so we can spend more time together :) Try different email subject line styles to find what gets the most opens. Sit up straight. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! We’re very font of you because you’re our type.