This document discusses best practices for implementing a "shift-left" strategy to move quality assurance activities earlier in the software development lifecycle. It recommends having quality be everyone's responsibility, focusing on delivering valuable features, adopting an automation-first mentality, embracing continuous feedback through a "fail or learn fast" approach, and continuously improving processes. The document provides examples of how some organizations are successfully shifting left, such as through continuous integration/delivery pipelines, minimum viable products, and behavior-driven development. It also describes how Applause's in-sprint testing service can help teams validate features within a sprint to avoid context switching for developers.