For this exercise, I did not sketch my entertainment center: I sketched the negative shapes. By sketching the shapes that were not my entertainment center, its image emerged. I used a viewfinder for this exercise, so the rectangle around the sketch is the border of my viewfinder.
I used my entertainment center as a subject (or non-subject) because I spend a lot of time in front of it. It’s a way to relax and spend time with family.