Is anyone even reading this? Generating witty text... Don’t forget to add a fun, relevant call-to-action button to your email. Keep your email subject line short and attention-grabbing. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Sit up straight. Don’t make ‘em yawn! Keep your emails exciting and brief.