Here's a little extra.

This is the TOC from my GDD.

Physics Adventure in Space-Time -- Massively Multiplayer Online Game Design Document

Please note that it's a MMOGDD and thus the 100 pp. is just the start. Once I "fill out" the data, it should get to 400-500pp. At that point, the GDD will be "almost" done.

Also note how I'm starting with a 3 pp. summary; then go into a little more detail about the game spending a page or two on the big areas of the game; then we go into deep detail about the specific game systems; and we end with a series of tables outlining every item, location, ability, etc that will go into the database.

Please use this TOC as an example of some of the things you might want to have on your own or how to organize your own.