Get creative with emojis in email subject lines to increase open rates! Time to get that bread. Boost your email opens with a punchy subject line. [insert fun loading text here] 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Don’t make ‘em yawn! Keep your emails exciting and brief. Sit up straight. Don’t forget to add a short preview description to encourage people to click on your email.