The How-To Email Subject Line Formula

{Attention-grabber}: how to {avoid or get attention-grabbing thing}
How {world-class example or average joe} {does amazing thing}
How to {do amazing thing}
How to {do amazing thing} without {unpleasant thing}

Focus on the benefit or value with this formula for subject lines.

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The AIDA Formula in Drawings

This is a great image showing the AIDA Formula and the purpose of each part:

Attention: Get their attention with something catchy and relevant.
Interest: Tell them interesting …

Cognitive Biases Chart

This is a helpful chart that can improve your copy by adding a scientific flair to it when explaining something.…