This document provides a cheat sheet on conversion rate optimization (CRO). It defines CRO as changing website aspects to increase leads, sales, subscribers, etc. by understanding what visitors want and delivering that experience. The document recommends using plug-and-play CRO tools for easy testing of page variations. It outlines how to plan tests by prioritizing high-traffic pages and estimating potential impact. It also provides tips on patiently testing variations, analyzing results, making permanent changes if successful, and continually optimizing the website.