I want my journals to be a place where I feel free to experiment and make mistakes. So my choice for
journals are old hardback books. They are easy to find at flea markets and garage sales, and are almost always cheap. Of course I always check to make sure I am not about to destroy a valuable first edition.
My favorite book size is 5.5 x 8.5 inches. I cut paper 5.25 x 8.25 to glue inside. That is the size of all my templates here at What Makes Us Come Alive.
Then I line up the blank paper, (or art that I created (like the mosaic I glued together above) or a template along the glued tab and press. If the book gets too thick I rip out original pages.