Next, sew the pockets and the ribbon to the backing fabric, making sure that you're working through all the layers as you go.
Once all the pieces are together, use pins to roughly mark a spot on the bottom edge of the piece about every 2 inches. These will be your guides (take them out before you start sewing) to stitch the individual pockets.
It probably doesn't matter what order you sew these lines in, but I started in the middle and worked out. I also stitched the middle line all the way up the piece to add a bit more stability, but the rest of the lines I stitched just to the edge of the top pocket. You can do this any way you like, and use decorative stitching if you like rather than straight stitching if you desire.

