Don’t forget to add a fun, relevant call-to-action button to your email. Generating witty text... [insert fun loading text here] A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Time to get that bread. Don’t make ‘em yawn! Keep your emails exciting and brief. Get creative with emojis in email subject lines to increase open rates! Keep your email subject line short and attention-grabbing.