We've provided a sample proposal to help you get some ideas on how to structure your own proposals. It's not perfect, but we wrote it that way. At the end of the proposal is a review and summary showing what's good about the proposal, as well as what parts need work.
We're working on adding more to this page, so check back as we have at least one more in the making. Adding a few varieties is the idea, since there is no one format that works for everyone.