Let your imagination run wild. Sit up straight. Keep your email subject line short and attention-grabbing. Keep an eye on your email open rate to analyze and improve performance! Try different email subject line styles to find what gets the most opens. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Boost your email opens with a punchy subject line. Avoid getting marked as spam! Only email people who have agreed to receive emails from you.