Great free stuff from Steve

Steve Stafford is a pillar of the Revit community.  There are some great free downloads at his site, AEC Advantage.

Check out the downloads page:
http://www.aecadvantage.com/links2

There is a great document on Revit Roles in a practice, and a cool example of how to handle non-perpendicular Grid Display.  You can also find a Door Family tutorial handout from AU.