The Bargue Drawing Method is a form of classic life drawing. It's the study and break down of a model into their most basic lines and shapes then building up from there.
These drawings can improve your observational skills, shading and anatomy.
During this step you'll be laying down the ground work. You'll want to focus on getting the lines that touch the edges of the drawing area. In this example those lines are the top of the hair, just below the broken shoulder (screen right), and at the end of the clavical where it meets the shoulder (screen left).
Using a black and white image makes shading much easier.
Next you'll want to lay down some basic shadows. We're filling in the areas we outlined in the previous step.
Add some more details. Here we're putting shading that was softer or didn't have a hard line to them.
And some more shading and details. Here we go over the darker shades, to make them pop and improve contrast. We also do a few touch ups in areas like the eyes where the shading overtook the bottom lids.