One of the most exciting things about designing your genealogy scrapbook is deciding what goes where.
The layout is important for displaying your family history correctly. You should choose documents that really bring the nostalgia of the times as well as the interesting facts about each person. You can lay out the nearest relatives to you on single pages, and then as you go back in time, you can link spouses on a page.
This will obviously all depend on your research and what you have managed to uncover. For instance, if you find that you have a military hero or someone important in your family's history, you can highlight them in the family history by giving them a special page of their own, where you can include certificates, medals, newspaper clippings and more.
One of the other decisions regarding the layout that you will have to make, will be the order that the genealogy scrapbook is in. If you start off with a double spread of the ancestral history, you can then follow on in order from the last relative on the list to the newest.
You could also create a more interesting scrapbook that allows you to block off sections for specific family sections. So, for instance, you could take a set of great great grandparents and organize that side of the family into a section of the book, and then do the same for the other side.