I wish I looked as good as you while waiting Sit up straight. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Boost your email opens with a punchy subject line. Test, test, and test again! Make sure your email looks good on all devices before you send it out. Not just a pretty interface Generating witty text... Avoid getting marked as spam! Only email people who have agreed to receive emails from you.