On the blog, Art of Dave Pimentel came across some really nice posts on drawing for animation
(for those who think that "drawing" skills is not important in 3D animation era, it trains your eyes to pick up better posing for your characters and also spacing, even if it is stick figures you can still capture emotion. Other than video reference it is one of the best tools in your arsenal when it comes to animating).
"the more that you have observed the easier time that you will have when you create" Dave Pimentel
Artist in Animation vs. Animation Artist
Straight and Curves
Mr stickman vs. contour approach
The drawing pivot point