“You might want to: Set up your own company. Publish a magazine. Develop your own clothing range. Launch an
Internet radio station. Create a website. Support a
campaign. Start a record label. Open a design studio.
Organise a festival. Put on a fashion show.

Found this site yesterday, although it’s mainly for those in the UK it does provide valuable general advice, so below are the best pages..
Have you got what it takes?
Run your idea through the ultimate road test
All you need to know to create a business plan
i-Focus Magazine (filled with lots of tips and personal experiences from entrepeneurs)