E-Commerce Insights: Use Online Testing to Increase Print Catalog Response Rates

3. Use online testing to develop taglines and copy for your “hero” products. I know at least two best-selling authors who used online testing to pick the best titles for their books: Tim Ferriss, “The 4-Hour Work Week: Escape 9-5, Live Anywhere, and Join the New Rich”; and Ian Ayres, “Super Crunchers: Why Thinking-by-Numbers Is the New Way to Be Smart.”