Ask HN: I'm about to write a business plan. Where should I start?

Hey guys,

After weeks of brainstorming and discussion with my business partner, friends and colleagues, I have finally decided that it was time to start designing and building my web app.

I've gotten quite a bit of work finished in the last little while, and have naturally started writing down various snippets of information such as monetization strategies, launch plans, competition, etc.

With all of this information coming together on paper, I think it may be a good idea to write a decent business plan. I'm told that having a good business plan can be pivotal in the success of a company, and although it isn't the end-all to success, I feel as though I will have more direction with a proper business plan.

My question is this: Where can I find some excellent documentation in terms of writing a business plan? I'm looking for resources in the form of guidelines, tutorials and examples, blogs, etc. For the record, I've tried some simple Google searches, but most of the results are absolutely bunk and totally outdated.

Thanks for your help.