GO WITH THE FLOW: Basically, you're following the direction of object's shape, that is the hair. The hair will curl around, flow from, and slick to the head. The head is like a curved ball, so the hair extends from that ball by the arrowed directions. Keep practicing stroking in one direction, letting the pencil flow off... as if you're painting your nails or brushing off your pants. See? Play with that pencil, honey. See how those strokes FLY OFF THE PAGE. LET IT FLOW, DUDE! ***Those parts... let little strokes of hair (roots) appear at the edge of the parts. Click on this picture and see those tiny strokes.