Small Space Tips - Design Ideas For Studio Apartments - A bookcase does double-duty by creating a living room wall of sorts; behind it, a floor-to-ceiling open wardrobe creates a bedroom boundary and expands closet space.
Room Divider made from old doors. Wheels make it easy to move. Click the pic for many more DIY home decorating ideas. -- this would be a good idea for a studio apartment to separate the bed from the kitchen/living room area