Kevin Kelly wrote an article about how creative artists can build enough of a fan base in order to support themselves and their craft.
His basic premise is that while most everyone dreams of having millions of fans. If you remove a lot of the structure from in between the artist and their fans - an artist really only needs 1000 True Fans. He defines "True Fans" as fans who can't wait to go to their next show or buy their next CD, who would buy a t-shirt or hat from the artist. He admits a video maker might need more than a musician, but he is basically trying to present a tangible goal for artists who rely on having a fan-base. This is particularily notable for musicians.
I'd encourage anyone who has to think about turning creative work into income for themselves or their clients to read the article in full.
1,000 True Fans by Kevin Kelly
Originally I saw the article linked at cinematech.blogspot.com - one of the only blogs I read semi-regularily.