Don't wallow in brainstorming. Time spent fiddling with a business plan or filling up whiteboards with ideas is time that you could spend actually launching your business and seeing if the idea floats. Launching gives you real, solid feedback, instead of the imaginary 'what if' scenarios dreamed up
There's something really nice about not sitting separate from the crew in some massive trailer away from the studio. To actually be there with them, it's more of a creative process.