Avoid getting marked as spam! Only email people who have agreed to receive emails from you. Generating witty text... Get creative with emojis in email subject lines to increase open rates! [insert fun loading text here] Want the loading time to be longer so we can spend more time together :) Not just a pretty interface 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Keep your email subject line short and attention-grabbing.