[Sigia-l] audience analysis

[PeterV]

Hi gang,
when doing audience analysis, what types of categories do you tend to use 
to divide your audience up? What are the rules for this? It was always 
clear to me how to divide my audience when doing a project, but I'm trying 
to find out what the generic *rules* are. Any good online references / 
books to check out?

Thanks as always!
PeterV
http://petervandijck.net
http://poorbuthappy.com/ease