5. Use a Bookcase
I love the idea of using an open bookcase to separate areas because it serves double duty: division and storage. Be cautious how you dress the shelves, though. I highly recommend that you do not stuff your bookcase to the gills. Leave some open space to allow brightness to filter through and highlight the objects.
Also, choose a high-quality, sturdy unit. This is not a piece to skimp on because you do not want this unit to tip over. You should always anchor and secure a freestanding unit that you’re using between spaces. Or, as in the example shown here, the bookcase unit is attached to the ceiling above and a pony wall below, ensuring it stays in place.
You could also consider a solid bookcase, which will create a more definitive separation. In that option, you could place two bookcases back to back, so you have storage on both sides or hang art on the back of one bookcase.