Watts what?

This was done from a photo of Naomi Watts. I'm going to try to improve at drawing recognizable likenesses of individuals. I suspect there's no particular trick to it- it's a matter of observation, and paying attention to the  angles of the various lines that define a form, and the relative lengths of these lines, and distances and  angles between key points. Also a matter of overcoming preconceptions about how things look, or should look.