Don’t forget to add a fun, relevant call-to-action button to your email. Generating witty text... Keep an eye on your email open rate to analyze and improve performance! Get creative with emojis in email subject lines to increase open rates! Fighting off robots… Don’t forget to add a short preview description to encourage people to click on your email. Keep your email subject line short and attention-grabbing. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email!