This is a scene I made to test out the new denoiser feature in Blender 2.78c and it turned out
looking decent. I tried to go for a lived in kind of look and sort of student part after-math situation.
Looks like a hallway between rooms. So perhaps a ceiling light or wall sconce, doesn’t need to be lit, but it would make sense to have it there. Other than that? Maybe something like a bag (backpack?) or something like posterboard presentation or some similar project leaning on one of the walls.