Sit up straight. Test, test, and test again! Make sure your email looks good on all devices before you send it out. Try different email subject line styles to find what gets the most opens. Join 4 million members in making awesome marketing content. Keep your email subject line short and attention-grabbing. Don’t make ‘em yawn! Keep your emails exciting and brief. Boost your email opens with a punchy subject line. Don’t forget to add a short preview description to encourage people to click on your email.