Table of contents should reflect the development process. I.e. hooks, file locations, how to do things conditionally, use of pre-post-override methods, priorities, language variables, portability issues (Ie. upgrades blasting your addons), etc.
If you look in the developer area you'll find an old tutorial I did using movies as an example of how to develop an addon. It is a very simple case but you might find the “flow” to be appropriate to your task. I think you can search for “movie” in the developer corner section with me as the author. I think there were 6 tutorials in all.
Suggest you define an addon that would utilize most of the system (admin, customer and mail for each) that utilizes php and template hooks and uses a form entry in admin with results used in customer (like having it add a tab to a product detail page and/or to make something happen as a result of an option selection).