Don’t forget to add a fun, relevant call-to-action button to your email. Get creative with emojis in email subject lines to increase open rates! I wish I looked as good as you while waiting Try different email subject line styles to find what gets the most opens. 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. Want the loading time to be longer so we can spend more time together :) Keep your email subject line short and attention-grabbing.