I’ve been doing a lot of digital art lately. Because of this, I’ve started a quest to improve my basic art skills. A friend recommended reading a book called “Drawing on the Right Side of the Brain” by Betty Edwards. This book has renewed my interest in sketching — and I mean with real pencil and paper…not a computer program. 
The book has several different exercises as you work your way through. This picture was one of the references to use to practice drawing. Click the thumbnail to go to the picture. From there you can navigate around the gallery to see my other skectches. There are three from my recent attempts and several from a couple of years ago. I’ll post more when I get a chance.