I noticed that even by researching about the problem, it is still difficult to understand the full length of the problem. They say that the space is small, but what's wrong about it being small?
So I decided to conduct my own research of experience the life in a studio apartment. It's kinda hard to wrap my head around it, since I lived in a 3 bedroom condominium, but then again, I always stayed in my bedroom, and only going out to use the kitchen, dining room, and the bathroom when I needed it. I never used the living room. So it's not that different from a studio apartment. The only difference is that I have walls separating the rooms.
Like others, I also face the same situation, but rather than the room being too small, I find that the problem lies with storage. I can never seem to have enough storage to keep my stuff, so they always lie in piles in the corner of the room. And there's projects, which makes it even harder to keep them all without them getting squished. And my bed seems to take up almost 1/3 of the room, making it smaller that it already is. I do a lot of illustration sketches, so it's not surprising that I have papers all around the place. I don't even have a proper desk, so I would always used the small foldable white table that I can put on the bed whenever I need a flat place to work with other than the floor. Before I would use the wide window ledge by my bed to do my desk-work, but because i have been sitting in a kneeling and hunchback position for long periods of time, I tend to suffer from backaches and leg cramps, which have made reconsider using that area. So now that area is more or less a place for storage or some kind of sitting area so that I can look out the window.
Other than the bed, I also have a dresser table, honestly I used it more for storage and a surface to put stuff that I can just pick up from, and a built in wardrobe. I don't have a bookcase for my books, so I always left the in a box since I never take them out to read anyway so no use in getting another furniture. It'll just make the room smaller.
Since the place is rented I can't just simply renovate the area, so the only way I can think of is by using multifunctional furniture, with plenty of storage space.