Life Drawing Session

Hey guys,
I was able to make it to today's lunch time life drawing session at work. As usual, I'm really glad that I went and wish I could go to every session. The instructor suggested a different approach for me to take when drawing. He said to draw really lightly and then pay attention to the center of things. He said I tend to pay attention to the outer contour of the figure while leaving the inside blank. His technique can be seen in my drawing of one of the model's legs. I worked on defining the shapes inside the leg and then worked on the contour, only darkening certain areas while leaving other faint. He said that helps to give the drawing a sense of personality rather than having a consistently dark contour line. I already draw lightly, I just end up going over my lines so many times that they end up all being the same shade. I'll have to make a conscious effort to work on that.