Just to highlight some of the answers to a lot of questions I get asked. On TechNet there are various Reporting Services InfoCenters.  These InfoCenters are navigation topics in the SQL Server Books Online.  The information is organized by the roles that you would use when working with Reporting Services.  I have found these very useful when answering a lot of the questions that I receive.

Reporting Services Administrator InfoCenter
Reporting Services Developer InfoCenter
Reporting Services Analyst InfoCenter
Reporting Services Information Worker InfoCenter