Business Planning

So Bunnie has been bugging me to put together a business plan. I keep telling her that I have a business plan, but it is all in my head and constantly revised! I think she is worried in case I get run over by a bus or something.
To protect Bunnies income in case I die prematurely(!) I have been reading up on running my own business and stuff like SWOT analysis and I am going to document the way the business runs, write some procedures and stuff. Boring.
Good job there is some entrepreneur support available on the internet, or I think I would go nuts :)