These are your basic shapes. The Cube, The Cylinder, and The Sphere. These shapes are the key to all good art. I know I'm always talking about shapes but this is why. Understanding cubes can help you get a better grasp on perspective. Spheres can help you with drawing heads, faces, even joints. You can use cylinders to map out limbs like the arms and legs. All of these are very useful in their own right. Take some time to study over these and get a good understanding of how to draw them from all different angles