PSA: I hung a $9 curtain rod in my rental in Boise and the room went from cave to cozy in one afternoon
A delivery driver asked if I had just moved in because the place looked so bare, so I moved one lamp off the ceiling light, swapped in a $4 warm bulb, and hung a curtain rod above the window frame instead of at it, which sounds like nothing but the whole corner finally felt like a room, and now I want to know what one cheap fix did the most for your space.
Hanging curtains above the frame instead of at it is one of those tricks that sounds fake until you actually do it. My sister told me the same thing years ago and I rolled my eyes so hard, then tried it in my old apartment and suddenly the windows looked twice as tall. Your mileage may vary depending on ceiling height, but in my experience it works almost every time. The warm bulb swap is sneaky good too, landlords love putting in those awful blue-white ones that make everything feel like a dentist's office. Honestly the cheapest fix that did the most for my place was just putting a rug down where there was bare floor, it killed the echo and made the whole room feel less like a waiting area. Anyway, nine bucks and an afternoon is a pretty solid trade for not living in a cave.