The best advice is - when drawing hair, don't draw hair.
Draw flow of mass, so dark areas, lighter areas. Little strands, darker strokes or erasure marks are the last touches and thats when it becomes hair.
As a viewer we don't need all the information, just the suggestion. We don't need every strand depicted, our brains will understand what we are looking at with a lot less information.

I'll do a more extensive post on drawing hair if it would be of use to followers.
Follow and vote my art posts & comments and it'll help me justify the time to make more instructional posts. I want artists to connect and learn together, thats how we build a good network, get funding and cut through the spam.