"I use PosterMyWall to create flyers for the MANY non-profit organizations that we are involved with!" - Stachia Sit up straight. Boost your email opens with a punchy subject line. Keep your email subject line short and attention-grabbing. Don’t forget to add a short preview description to encourage people to click on your email. Get creative with emojis in email subject lines to increase open rates! Let your imagination run wild. Don’t forget to add a fun, relevant call-to-action button to your email.