This document discusses how to optimize a travel website. It recommends identifying goals upfront and beginning with brainstorming test ideas. An example is provided of how testing small changes to button text and page layout on the booking confirmation page led to booking lifts of 2.6-8.69%. The document advocates mixing simple and complex tests across markets, journeys, and devices and revisiting priorities quarterly based on new data. An example EU cookie law test is described which found an optimal notice message and placement.