Next I want you to get back out the shapes from lesson 1. Arrange these shapes into a still life. And do a line drawing of them using your easel like the other exercises. Concentrate on accuracy and work on this until you feel comfortable doing it accurately.
Also I have not mentioned this because we are not doing shading yet. but it might help to have one strong source of light to make the shapes clear. But really as long as you can see the shapes clearly a single source of light is not that important in line drawing.