To optimize email open and click rates, marketers should include four key elements in their emails: 1) A compelling subject line that tells recipients exactly what they want to hear. 2) Crisp copy that packages the offering in a few compelling words addressing the value and problem. 3) Images to leverage visuals to convey the message and grab attention. 4) A clear call-to-action button using action-oriented words to grab attention and encourage engagement. Following these tips can help marketers achieve the highest possible open and click rates.