This document provides tips and tricks for mastering LinkedIn. It outlines hacks for discovering a prospect's interests, hiding your connections from competitors, sorting connections into groups, searching a connection's network for referrals, optimizing your profile for search, finding out a connections' total number, exporting email addresses, messaging non-connections, finding common connections, customizing connection requests on mobile, reorganizing endorsements, viewing profiles in Gmail, and setting up automated lead generation via saved searches.