Violet Audios, Four Chapters

Use this low-content book to create characters, settings, internal or external factors that might affect the outcome of your fiction. Fill the 200 8.5x11in pages with details, or even just doodle in there if you want...
This is your creativity catch-all. Gather up all your story ideas and put them in here. $6.95 plus shipping in the US amazon store.

Written as a companion guide for the Worldbuilding Workbook, you can grab this as an ebook, or better yet purchase the paperbacks together for a more hands-on experience. This companion book is meant to be a sort of instruction manual on how you use your workbook, but also contains suggestions on how to use a three ring binder and create a workbook of your own instead.