Don’t forget to add a fun, relevant call-to-action button to your email. [insert fun loading text here] Want the loading time to be longer so we can spend more time together :) I’m worth the wait Keep your email subject line short and attention-grabbing. Don’t make ‘em yawn! Keep your emails exciting and brief. Don’t forget to add a short preview description to encourage people to click on your email. Boost your email opens with a punchy subject line.