The document discusses lessons from highly effective hiring organizations. It emphasizes the importance of focusing on culture fit when hiring to avoid costly mis-hires. Successful companies like AirBnB, Google, and Facebook are very deliberate in their hiring processes, conducting in-depth reviews of candidates and having well-defined criteria for assessing cultural match. Building an exceptional employer brand is also key to attracting the right candidates and repelling those who are not a cultural fit. The best hiring organizations leave nothing to chance and are very focused on strengthening their culture through new hires.