Studying different versions of head abstractions I can find off the net - mostly from artists demos where they show their step-by-steps. Trying to find out which "method" or which particular abstraction lines make the most sense to me. Also at the same time practicing my line control.
Also some (pretty bad) studies from photo reference, focusing on constructing the heads using the abstraction. The more I draw these the more I start to see vague connections between certain abstract lines and the muscles of the face, which is quite interesting.
Areas I want to work on: line control (or more specifically learning how to use the charcoal pencil), understanding facial muscles and bone structure (I think the abstractions would make much more sense if I actually took the time to learn the underlying anatomy) and specific facial features (eyes, mouth, nose, ears, etc.) Definitely still struggling with the features especially - I keep feeling that I still draw them really "flat" looking.