How I turned a new notebook into a century-old diary for a film

I was helping on a low budget indie film last month and we needed an old diary for a key scene. All we had was a plain new notebook from the store and no money for fancy props. I saw a video once about using coffee to stain paper, so I tried it. I brewed some strong coffee, let it cool, and dipped the pages in it. After letting them dry, I rubbed the edges with sandpaper to make them look worn. I even carefully singed a corner with a lighter to add some damage. The final prop looked so real that the director thought we bought it from an antique shop. What other easy tricks do you use for making paper props look old?