Here's an impressive DIY project that can turn a studio into a one-bedroom apartment or otherwise create distinct areas in your home with sliding doors.
IKEA Hacker Jules posted this information about his studio renovation. He and his girlfriend didn't want to have their bed in the living room, so they turned IKEA's PAX cupboard doors into a sliding room divider:
We measured the size of our Ikea beds and marked off the new room so it would fit our bed and some clothing space tightly in order to save as much space in the living room as possible.
I whipped up 2 wooden frames and mounted them to the ceiling, walls and floor. I then mounted the PAX doors and tidied up the frame.
This is what it looked like in progress while mounting the wood frames:
The end result is they now have an actual (albeit small) one bedroom apartment that's fairly attractive.
If you have a space you'd like to turn into more rooms, take a look at Jules' post for more details.
Turn your studio apartment into a 1 bedroom with PAX [IKEA Hhackers]