Feel free to spin in your chair while you wait Keep your email subject line short and attention-grabbing. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Sit up straight. "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Let your imagination run wild. Get creative with emojis in email subject lines to increase open rates! 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!