Lightly crumple the notebook cover and pages, then flatten them
Rub the edges with sandpaper or a dry cloth
Stain the cover and page edges with diluted tea or coffee
Let the notebook dry completely
Fold corners and bend the spine slightly for wear
Smudge the cover with a little graphite or dirt
Tear a few small notches along the edges
Fade the cover with brief sunlight exposure
Add faint pen marks, stamps, or handwritten notes
Use a warm iron on low heat with a cloth barrier to age the paper
Distress the binding gently so it looks used
Store it with old books or papers to pick up a worn look