Use a bookshelf as a room divider : Studio normally comes with small open space, so, it is quite hard to establish the definite floor plan. However, you can divide the function of the room by using the large furniture, such as, large book shelf or cabinet, as a wall.
Turn your bed into a daybed : Turn your bed into a daybed during daytime, by pushing the twin bed against the way and use the large throw pillow as the couch.
Try a Loft : For high ceiling studio, creating a loft is a great way to increase the space. You can utilize the upper area as a bedroom, and lower area as living room.
Create Your Own Closet Space : You can use the open wall to create the open-air closet by using rack, drawer and shelves.
Get Creative with Shelfing : Create some unique shelving on the open wall to increase the storage space and more decorations.
Hang Your Bike : You can simply hang your bike on the wall like a piece of art.
Use Curtains to Define Your Space : Use curtain as a partition to divide the space.
Make Use of Every Corner : Use corner sofa to make the seating area at the corner of the room.
Focus on the double duty furniture : Find the furniture that has the storage underneath. For example, ottoman with storage space at the bottom, or bench with the drawer underneath.