Still using simple newsprint and a china marker, close your eyes and draw a face as you see it in your mind’s eye. NO PEEKING! Draw for 2-5 minutes, eyes closed, running your china marker along the imagined face.
The result is always fun, surprising, Picasso-esque. Great for turning off the inner-critic.
You can’t depend on your eyes when your imagination is out of focus. – Mark Twain