Dividers
If you are not keen on putting permanent walls, and your cabinets and shelves are not enough to serve as dividers, you may want to consider room dividers which come in different designs and material to fit your personality and your budget.
Portable room dividers come in foldable, sliding or static designs. You may choose a plain divider and put on stickers as designs. Some are designed as picture frames, where you can insert photos. Glass dividers add elegance, and mirror dividers create an illusion of space.
Your bedroom may also use a divider, especially if you have a work area. You may also use a divider for your closet area, so you can dress up not worrying whether the door is locked or not.