If you aren't following the Animated Spirit blog... you might want to add it to your list of resources.
There have been quite a few useful and interesting posts there since James Chiang first launched the blog back in June.
James is a 17 year veteran of animation.
In the latest post James analyses a shot from Pixar's 'Ratatouille' where he delves into how the audience is directed right to the place you want them as well as what that means relative to characters /elements in the shot.
There's too much to summarize here so go see for yourself. Amongst other topics James emphasizes that "Forces begin internally" and that "Understanding forces is the key to believable animation". Read more and see examples here:
http://www.animatedspirit.com/shot-analysis-lead-follow/
One of the things I like the most about the blog is that by subscribing new posts are sent direct via email which makes for timely reading without even visiting the blog itself.