Got some dull knives in the drawer? Learn how to sharpen them with Instructables' guide to knife sharpening. Includes step by step instructions and necessary materials, as well as practical advice such as "Don't chop your fricking thumb off", "Buy yourself a sharpening stone for a dollar in Chinatown. If your city doesn't have a Chinatown, get one or move somewhere civilized", and "This step is a totally unnecessary way to show off. You can impress people this way, especially if you rip your leg open, blood gushes everywhere, and they have to take you to the hospital." — Wendy Boswell Knife Sharpening Tricks [Instructables]