I just picked up a copy of Richard Williams’ Animator’s Survival Kit from Amazon.com. This book is fantastic — loaded with great techniques for fooling the eye in terms of motion, follow through, keyframes, etc. Something I can really use in making these previs animatics. Most of the information is geared toward traditional hand-drawn, finished animation, but all of it can be applied to keyframed timeline-based previsualization animation that we do with computers these days, whether it be After Effects or LightWave or Maya. Great stuff.