Don’t forget to add a short preview description to encourage people to click on your email. Boost your email opens with a punchy subject line. [insert fun loading text here] "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Test, test, and test again! Make sure your email looks good on all devices before you send it out. Sit up straight. 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!