Slicing or dicing garlic, onions, and other pungent vegetables can be a smelly task - one that leaves your hands smelling of the project long after it's completed.
A quick solution? If you have a stainless steel sink in your kitchen, just run your hands along it several times. (You have to do this rather vigorously, so you might get some strange looks if others are in the kitchen, but it's all good.) Viola, no more garlic or onion smell!
If you don't have a stainless steel sink, you can use any other type of stainless steel surface. Or, they even make stainless steel "bars" (they look similar to bars of soap) that you could keep on hand.