Keep your email subject line short and attention-grabbing. Want the loading time to be longer so we can spend more time together :) I wish I looked as good as you while waiting Not just a pretty interface Feel free to spin in your chair while you wait Don’t forget to add a fun, relevant call-to-action button to your email. [insert fun loading text here] Test, test, and test again! Make sure your email looks good on all devices before you send it out.