1
Block the cranial ball and jaw first
Think in two masses: the round cranium and the tapered jaw. This makes it easier to keep the chin and side planes consistent when the head tilts.
Foundation guide
How to draw a face without losing the structure
Start with the head as a volume, not a sticker sheet of features. Once the cranial mass, jaw angle, center line, and brow band feel solid, the rest of the face stops drifting.
2
Wrap the center line around the form
The center line should curve with perspective. When it bends believably over the forehead, nose bridge, and chin, the rest of the facial alignment follows.
3
Use the brow line as your main perspective anchor
The brow ridge tells you whether the head is looking up, down, or away. Build the eye sockets and nose from that line instead of placing eyes first.