If you have a lot of chopping to do, or even just a little I recommend investing in a mini food processor. I have a 3 cup food processor that I use when I have tons of chopping, or if I just don't feel like blinding myself with onion juice. The mini food processor also works great for making small amounts of pureed vegetables.
I roughly chop my veggies so they fit, push the button and my chopping is done in a fraction of the time. the best part is that mine is dishwasher safe, so I don't have to hand wash it later.