I just began studying Loomis' Drawing Heads and Hands, but I'm having some trouble with constructing the head. More specifically, establishing the side plain. How do you determine how much to "slice off" on each side , and also how do you divide that space properly. From a 3/4 view my jawbone always looks way too long. I bet I'm making it more complicated than it really is, but I'm a beginner so this is all new to me.