: Constantly split-test headlines, ads, and landing pages to ensure every dollar spent generates a measurable return. Core Lessons to Remember
: Every ad must have a clear call to action and a measurable result.
Before launching any ads, you must identify the that generates the most revenue.
Sell Like Crazy: A Practical Guide to Dominating Your Market
: Focus on the 20% of activities—marketing and sales—that drive 80% of your revenue.