Before you do anything, rearrange your dorm room furniture. Here, the previous arrangement blocked the windows and didn't provide as much floor space. We moved the dressers and wardrobes against the walls to bring in as much natural light as possible.
There are so many uses for shelf brackets! These are shelf brackets, repurposed to frame a window --- what a clever idea. You could do this to define and separate spaces in the same room, too. (Say an entryway and a dining room.
DIY DOOR MAT: Glue Gun, Scissors, River Rocks at the dollar Store! and Shelf Liner (or mat) in a matching color. So great - it's hard to find a door mat that is large enough to go in front of the door with out looking rinky-dink and stupid :)