I'm all about making things easily accessible, so just in case you skimmed through my other article (How I've tripled my income this year) and missed the freebie, here it is.
I highly recommend going back to that article and giving it a read. In it, I've explained why you need a business plan, how a business plan totally changed my biz life and finances, and I've included a written tutorial on how to use this plan. Enjoy! :)