So you want to slice and dice like the pro's? Try this, let's take an onion for example. You want to grab the onion and slice off about a half inch on one end. Now hold the onion flat sliced side up. Now you will begin to make slices about a quarter inch apart down into the onion, but don't go all the way to the cutting board. You want to stop your slice just past half way down. Now you'll do this until you've covered the onion. Now make a half turn and do the same thing across the cuts you just made making a crosshatch pattern. Once you've finished, you should be looking down at a bunch of quarter inch squares. Now turn the onion back down longways and begin slicing. The result should be blazing fast and easy diced onion.