Fat quarters of fabric
(enough to make several coordinating journals
Extra firm double sided fusible interfacing (such as Peltex 72f or Fast2Fuse)
Coordinating thread (topstitch weight or embroidery thread is lovely here)
Sew with a wide zig-zag stitch around the edges of your covers. This is decorative and it will keep the cover together in case the fabric decides to un-fuse from the interfacing