Try different email subject line styles to find what gets the most opens. My day’s been ok, how’s yours? Keep your email subject line short and attention-grabbing. Boost your email opens with a punchy subject line. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Don’t forget to add a short preview description to encourage people to click on your email. Sit up straight. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!