Check out the post from Temple of Seven Golden Camels about how characters are blocked out during a dialogue scene. He uses the example from an old move called “Paths of Glory.” He also points out some key characteristics throughout the scene that help break it down into points that every animator can think about as they may begin a shot.
Some great posts over there.
And then on to Part 3 this really talks about using Squash and Stretch as part of the caricature in the animation. Almost knowing how far you can push a character before the audience notices.
Check it out some… good info. I am constantly learning how to use Squash and Stretch correctly and also when not to use it. I think as with most of the Animation Principles your understanding of them and how to use them will evolve as you evolve in animation.