I modeled a couch the other day. I started by making the arm and side of the couch, creating flat objects, and extruding and changing the sizes of them so they would match the picture.
This was definitely the most difficult part to create since the shapes had curves and more detail than the rest of the couch pieces. I eventually completed it though, marking three out of four pieces of furniture down I had to model, the first two being the table and storage cabinet.
