Want some nifty graphics for your mouldering scrolls and blasphemous tomes? Head over to Obsidian Dawn and check out Stephanie Shimerdla's free brush libraries, particularly the "Arcane Circles" and "Arcane Runes" sets. They're beautifully designed mystic symbols and diagrams that are perfect for jazzing up occult documents when you don't have enough time to do it yourself.
The artwork is set up to be imported as a brush set into Photoshop, but I didn't have any trouble using the images in the included sample table in Paint Shop Pro. Just select an individual graphic, cut and paste it as a new image, and then follow the normal procedure for saving it as a tube or texture file.