The whisk is a powerful, but enigmatic tool in your culinary toolbox.
Many cooks do not know how to properly use a whisk, and many that do will bicker endlessly over what is the best technique. Do you move the whisk side-to-side, or beat the bowl? What about simple stirring, is that the most efficient way of using a whisk?
Understanding this is very important if you do not happen to own a stand or hand mixer.
For those on any side of the whisk argument, The Science of Good Cooking has created nice, scientific, video describing what exactly is the best whisk method.