The LINE OF ACTION should always be active. Avoid vertical lines -- they are still and can make your character wooden.
Try a sweeping curve, a diagonal or horizontal LINE OF ACTION.
TIP: Use your whole arm to draw instead of just your wrist.
TIP: Add axis lines like a wire frame to help you see the dimension.
TIP: The hips are always attached across from each other and they are always opposite each other. If one is forward, the other is back. If one is up, the other is down.
TIP: Draw the structure lines for the arms off the top of the ball. Unlike the legs, the arms are independent of each other.
TIP: Experiment with different shapes of cylinders (4a). Curved lines against curves or, better yet, curved lines against straight lines form more dynamic and interesting shapes
TIP: The neck is always on the front side of the body and not on the top of the shoulders (5a).
TIP: Work RUFF and LOOSE; it will add more action attitude and spontaneity to your designs.