Maybe you've seen the famous Picasso drawing that's often presented upside down, then used by right brain enthusiasts to learn to see, and therefore draw, more accurately. I was teaching a drawing class for middle school students recently and I wanted the same kind of drawing for them to work from, but I wanted something more modern. So I found a photo of Dave Chappelle, turned it upside down and drew it. When the students got to class, I left it upside down and turned on the projector. Then they drew the drawing and theirs came out great.
My drawing isn't a likeness, but it has a lively, expressive quality that doesn't always show up when I sit down to draw. I'm beginning to share in the enthusiasm that those right brain folks have been soaking in for years!
Print this or another line drawing, turn it upside down and give it a try!