This is just to add to the weight practice I tried a figure lifting a heavy ball. The objects weight is conveyed in the figure by the back and head arching back when attempting to lift. Once the ball slowly lifts off the ground, the figures legs then start to buckle under the weight and so the ball is then released. It seems that delaying the objects movement from what is trying to move it really gives an impression of its weight. You can see the figure trying to move it before its even lifted off the ground. So either the object is too heavy or the figure is too weak.
My next areas I still need to try focusing on is animating dancing, expressions, dialogue, anticipation, and animal movement. All of which I hope to explore in the near future.