We’re very font of you because you’re our type. [insert fun loading text here] Generating witty text... Keep your email subject line short and attention-grabbing. Test, test, and test again! Make sure your email looks good on all devices before you send it out. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Boost your email opens with a punchy subject line. Don’t make ‘em yawn! Keep your emails exciting and brief.