Perhaps a better name for this article may be "How to Win and Manage Novice Clients", but the contact is still great.
This article is written with regards to a website designer, but I think ANYONE doing any type of freelance work can gain something from this article, whether you're a musician playing gigs, a journalist doing a little ghost-writing, or an IT Consultant.
The article gives a few pointers for dealing with novice clients, but rather than just telling you what to do, gives a good explanation of each point from the client's perspective.
Find the original article
here. I was trying to pick out a couple of my favorites to quickly "hook you", but they're ALL good.
Check it.