Boost your email opens with a punchy subject line. Keep your email subject line short and attention-grabbing. Want the loading time to be longer so we can spend more time together :) My day’s been ok, how’s yours? Opening the door to unlimited creativity… 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Don’t forget to add a fun, relevant call-to-action button to your email. Sit up straight.