The Indie Band Survival Guide
Beatnik Turtle, an extremely clever independent band, decided to share what they experienced while endeavoring to increase their visibility and cash flow without "benefit" of a record label relationship, as well as their reasons for maintaining their independence. They made that document freely available here and if you are a musician, I strongly encourage you to read it cover to cover. Subsequent versions were picked up by a publisher and their value-add is not freely available but the contract stipulated the original would remain free.
Not surprisingly, a Web-based community formed around this concept of indies sharing ideas for increasing their viability which you might want to visit here to see what's going on and possibly get involved.