This chapter was about making things simpler. Guarding against complexity (aka overengineering—Rule 1) and simplifying every step of your product from your initial requirements or stories through the final implementation (Rule 3) gives us products that are easy to understand from an engineering perspective and therefore easy to scale. By thinking about scale early (Rule 2) even if we don't implement it, we can have solutions ready on demand for our business. Rules 4 and 5 teach us to reduce the work we force browsers to do by reducing the number of objects and DNS lookups we must make to download those objects. Rule 6 teaches us to keep our networks simple and homogenous to decrease the chances of scale and availability problems associated with mixed networking gear.