How to expose for Shadows with a Light Meter

I was recently asked how to expose for the shadows and so here is a pretty concise description:

For metering the exposure for the shadows, you basically hold the light meter under the persons chin (but not so close they are uncomfortable) and point the light meter toward the ground with the ball retracted so it is in the shadow of the face. Sometimes I lie to the light meter and tell it that I am shooting a slower film speed to give myself an extra stop of exposure just to be safe.