A cheap and quick way to separate space in a studio apartment - use pallets and a sheet of wood over the top to create a designated living room area. Also use planks from pallet to create a wooden wall to further create a sense of a separate space.
Using wood from pallets to create a barn-wood wall. (well, it looks like barn wood, but it& not.) Would work well with some of the other ideas in here. (painting or staining certain areas of wood, wood on ceiling? Or would it be too heavy?