Chris Senior from Revit Factory dropped me an email yesterday to say that he has started a blog called http://revitelemental.blogspot.com/.
“I’ve decided to setup this blog to discuss anything and everything Revit but primarily focussing on Revit content creation. I’ve been creating Revit families for the past 6 or 7 years and learnt a lot about what should and what shouldn’t be modelled as well as defining the appropriate level of detail. This has primarily been for Architectural firms I worked at in the past, then in more recent years for manufacturers and private companies”
As a long time user of Revit Chris has some good advice, so be sure to check his site out.