FIRST has produced a comprehensive handbook on running a FIRST Robotics team, especially useful for rookie teams just starting out. Also check out FIRST’s sample team timeline.
Chief Delphi is an extremely active community site for FIRST Robotics. The site has sections for white papers on various technical and non-technical topics, galleries of photos, and a huge set of forums.
Over the years, FIRST Robotics has put on several workshops for teams. Click here for a list of workshops and handouts that you can download.