Edges can add a little pizzazz to your papers, tags and journal spots. You can use them as in and try your blend modes. Or try placing a colored paper above the edge, clip them together and then use a blend mode. They are endlessly fun to try, and can completely change the look of a plain paper.
This set of grungy edges is made from my texture brushes. Each one is a 12x12 png file, created at 300 dpi.