Don’t forget to add a fun, relevant call-to-action button to your email. I wish I looked as good as you while waiting Generating witty text... Don’t make ‘em yawn! Keep your emails exciting and brief. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Sit up straight. 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.