This document provides 21 tips and tricks for boosting an employee referral program. It begins by outlining the benefits of employee referrals, such as being the top source of quality candidates. It then lists tips in the areas of branding the program, engaging leadership, holding contests, setting clear expectations, rewarding referrals outside the organization, treating employees like recruiters, and leveraging technology to match open jobs to employee networks. The document also identifies common pitfalls to avoid, such as making the program too complicated, not providing feedback, and lacking social referral capabilities. The overall message is that employee referral programs are a top hiring resource and following these best practices can help companies create high-performing programs.