The D&S Scary Sharp system originates from a post on the usenet group rec.woodworking, although the method itself probably predates WWII: with a piece of plate glass and progressively finer grits of sandpaper, you can hone your tool to an edge a professional sharpener would envy — without messy oil or water. And if you don’t have the materials on hand, Rockler sells a kit with everything you need to get started for just $30.
Rockler’s kit contains four different grits of peel and stick “high quality” sand paper, 25 rubber feet, a honing guide, and a a 12” (square) x 1/4” glass plate. The course system includes 220, 320, 400, and 600 grit sand paper for cleaning up nicks and correcting angles. The fine sharpening system includes 800, 1200, 1500, and 2000 grits — best for maintaining the razor like edge on your tools.