Test, test, and test again! Make sure your email looks good on all devices before you send it out. "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Don’t make ‘em yawn! Keep your emails exciting and brief. Try different email subject line styles to find what gets the most opens. Boost your email opens with a punchy subject line. Get creative with emojis in email subject lines to increase open rates! Keep your email subject line short and attention-grabbing. Sit up straight.