I’m worth the wait 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. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Fighting off robots… Time to get that bread. Avoid getting marked as spam! Only email people who have agreed to receive emails from you.