Start with your pocket pages. I made mine tall and thin to hold those long coupons. I started with an 8 1/2" by 9" piece of bright-colored cardstock. Then I experimented with it until I figured out how to cut it to get what I wanted.
I cut the pocket at an angle to make it easier to get the coupons into the pocket, and here you can see that the holes are in both pieces of the pocket. Fold the pocket piece to the back side of the page and glue only the bottom with a thin line of glue right next to the edge. Then from the leftover piece, cut another pocket to glue to the front of the page. I used several different colors and mixed them up on the pages. This pocket should be narrower than the page so that the edge doesn't get caught in the binding.
When you are cutting the vertical edge of the page, don't forget to cut the tabs for identifying each section. (I made a pattern that had four tabs on it so I could cut whichever one I needed for the page I was doing.) Cut some copy paper 4 1/2" x 8 1/2" to make your note pages for each section. Stack up your pocket pages with 4 or 5 note pages in between and punch holes in them down the cut edge, spacing them evenly, about 1 1/4" apart.
Next comes the cover. Cut two pieces of mat board or really heavy cardboard or chipboard for the cover. Measure your pocket pages and be sure to add the width of the tabs to the measurement of the covers. My covers are 4 7/8" x 8 1/2". (If your cover isn't heavy enough, glue two pieces together for the front and two for the back. Measure the depth of your stack of pages, measuring the folded edge, and add 1/2". This will be the width of the spine and the length will be the same as the covers. Lay your front cover, spine and back cover out on the table, with about 1/8" in between the pieces and measure for the cover paper. Add 1" all the way around. Cut your cover paper to these dimensions. You will need to use a 12x12" piece of paper, heavy enough to hold up under constant opening and closing. Glue the cover pieces to the paper, with 1/4" spaces, and glue the edges up around to the inside of the cover. Finish the inside by gluing in another paper that is 1/4" smaller all the way around. Glue the papers together in the spaces between the pieces really well and fold the covers over to make sure they are stuck together.
When you get to the middle of the book, loop an extra rubber band around the stick and just leave it hang there. This will be the band that holds the book shut. Mark your tabs and put a little sign on the front of each page that says "Today's Coupons". Now fill it up and start saving!