Start with the head shape and hairline
Sketch the main hair volume around the head
Decide the hairstyle and overall silhouette
Block in large sections first
Add the parting if needed
Draw the bangs, sides, and back separately
Follow the curve of the head with the strands
Use flowing lines for long hair
Use shorter, layered strokes for short hair
Add clumps instead of drawing every single strand
Vary the thickness of the hair sections
Show direction with line flow
Add overlaps where hair layers cross
Define the ends of the hair with tapered lines
Refine the outline and remove rough guides
Add highlights and shadows to show volume
Keep the hair balanced on both sides
Adjust the shape to match the face and pose