TONE - SHADING - TEXTURE: All those tiny strands, hundreds of thousands of them, are broken into sections. Then those sections making up a head of hair. Those sections form patterns, shapes, shadows and fly away strands. Take a breath of relief because you, the artist, don't have to draw every strand. You fake it... make an illusion... SHAPES: Check it out! If you don't know it already, those are the basic shapes in nature -- the ball, cube, cone, and cylinder. You can see a lot of those shapes in the drawing you are doing right now. Then when I speak of tone that is the general lightness or darkness of an object. Shading is the portion of an object away from the light. Texture is the final or "special" effect drawn on the surface of an object. These principles will stick after a while, bringing to you more technique as an artist.