In case you missed it, Guy Kawasaki, a former Apple success story and now a successful venture capitalist, has posted a three-part series of excellent articles for entrepreneurs on his blog http://blog.guykawasaki.com. They are very informative, and come with downloadable templates for Microsoft Office. They are
1. How to Create an Enchanting Pitch (includes a sample PowerPoint presentation)
2. How to Create an Enchanting Business Plan (includes an outline of a business plan in Word)
3. How to Create an Enchanting Financial Forecast (includes sample Excel files)
I also really like two of his earlier blog articles:
There are many other excellent articles on his blog that are worth checking out.