I wanted to write the same advice. Read that blog, from the beginning! And stop writing a business plan! You don't need one (at least as long it is not a task from one of your professors).

I would suggest these sources, too: http://startuplessonslearned.blogspot.com/ <- how to make your customers pay, before you build a product? http://steveblank.com/ <- stop doing "business" stuff. Go out of the door and talk to your customers. They pay your bills! http://www.avc.com/ <- one other guy, who likes to pay big bills on risky investments, and how he sees the world.