Outlining Your Book and Visualizing Your Goal
Connie Ragen Green

I love outlining. A little trick I do is bold the main category (or chapter title) and then indent the subcategories or points under the main category. If your book has a lot of pictures, as Organizing For Dummies did; I created folders for each chapter and put all supporting material in there so I knew what went there. That might include a list of story ideas or examples too.