Craftsy drawing class
I picked up a Craftsy class, 10 Essential Techniques for Better Drawing by Patricia Watwood, and this is what I produced for lesson three, where she's talking about composition lines, block in lines, and contour lines.
Above is my drawing with just the block-in lines to show where the angles and edges are. Below is the finished drawing.
I have another 7 lessons to go, I'm liking the format and this is one of my better drawings yet.