Just like skinning a cat, there's more than one way to sharpen a knife (disclaimer: while I advocate sharpening your knives daily, please don't ever even consider skinning a cat). There's a stone, for an uber-sharp finish; the underside of a mug, for an awesome makeshift sharpening tool; the chef's daily ritual, honing with a sharpening steel; and then there's the remarkably simple, old-school Japanese trick—using a newspaper.