Sit up straight. Don’t forget to add a short preview description to encourage people to click on your email. 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 :) Don’t forget to add a fun, relevant call-to-action button to your email. Keep your email subject line short and attention-grabbing. I’m worth the wait Boost your email opens with a punchy subject line.