A while a go myself and Richard Pineger wrote an article on Managing Content in Author-it in the Autumn 2008 ISTC Communicator magazine. Although it is based on version 4.5, I think much of it is still valid and true in version 5. We used an anaolgy of gardening all the way through, hence the title. I think the analogy works quite well but it may wear a bit thin by the end.
The PDF for the article is here.