The next step in my process is to select the order the pages are in. Half of the pages will be double-page spreads. The other half will be single. This has to do with the way I plan to assemble the book.
If I put the front and backs of each signature together, and then stitch each one down the center to the spine, the outside layer will end up next to the outside layer from the previous (or next) signature.
In the image above, each face up piece is a double-page spread. Each turned corner is the back side. The order they will go in the book is from left to right and top row to second row.
Now I have to search around for something to put on the back of each page to make it a bit stiffer.
Enjoy!