There are several types of knife sharpeners out there -- everything from no-fuss electric models to zen-like manual sharpening systems. Which you choose depends partly on what type of knives you want to sharpen and how hands-on you want to be. If you go the quick-and-easy route, try an electric sharpener like the Chef's Choice 120 Diamond Hone 3-Stage Professional Knife Sharpener. But if you're as interested in the process as you are in the result, experts say a manual sharpener is for you. Manual sharpeners can also be used on more types of knives, even short pocket knives. We found the best reviews for the Spyderco 204MF Tri-Angle Sharpmaker System. Read about more types in our knife sharpener report.