Not a digital artist yet (come Christmas, I will be though) but this tut is already so helpful. The eyebrows bit and the eyes bit were eye-openers for me, I'm ashamed to admit. But I'm very glad you pointed them out - thanks for taking the time to do this tutorial! <3
Cool~ Though to check your anatomy, the "tip" of the nose is equal to the bottoms of the ears. And (okay, I'm guessing with this cause I forgot) the actual "face" (chin to eyes-ish) is about 2/3 of the entire head.