"Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Boost your email opens with a punchy subject line. Sit up straight. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! [insert fun loading text here] Don’t forget to add a fun, relevant call-to-action button to your email. Don’t forget to add a short preview description to encourage people to click on your email. Don’t make ‘em yawn! Keep your emails exciting and brief.