Boost your email opens with a punchy subject line. One Mississippi, two Mississippi… 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! My day’s been ok, how’s yours? Avoid getting marked as spam! Only email people who have agreed to receive emails from you. Keep your email subject line short and attention-grabbing. Sit up straight. Try different email subject line styles to find what gets the most opens.