Yeah, I took long enough to make just the basics, but the ideas are sound. These proportions are completely average or generic and are more or less suggestions for making an aesthetically-pleasing human face. However, as with most things creative, you need to understand the reality of your subject before you can exaggerate those aspects in a satisfying way. Altering these proportions slightly has a profound effect on how a face reads. For example, if you were to move the lines a bit so that the forehead is smaller and the chin/jaw is larger, your character might not look very intelligent. and if you were to do the reverse, your character might look young and innocent. I've also noticed that longer noses make a character seem untrustworthy. I think my next tut will cover facial anatomy and expression, which is something I've studied a decent amount.

Unfortunately, I am in the middle of a huge top secret project that I can't really say much about, which also dominates nearly all of my free-time. I'll try and post something new soon!