I can use a wide variety of line styles, but not smudging, including contour lines, cross hatching, stippling and textured lines with an entire range of values.
I can fill up the entire page so there is more figure/motif than negative/background space.
I can create the illusion of three dimensions by using relative size, overlap and value changes. Things in front will will be larger, darker.
I can indicate the plane the shoe is resting on by drawing a shadow where the lines describe the plane of the table.
I can draw with my hand lifted and un-anchored from the table and using my entire arm to help create lines that seem to curve by changing value as they curve.
I can finish my drawing on time.