This document discusses 5 key things to know about managing permissions in SharePoint: 1) The different levels of permissions that can be restricted, 2) the default groups and permissions on Team Sites, 3) the importance of always adding yourself with full control access first when breaking inheritance, 4) getting the settings right for new groups, and 5) only checking permissions one site at a time. It was written by a Microsoft MVP as an overview of managing permissions in SharePoint.