You have too much stuff.
YOU HAVE TOO MUCH STUFF.
Oh, and: you need to clean. At least vacuum. And at least some dusting.
Me, Possessor Of Said Head: *piles much stuff on bed*
*looks at bed covered in stuff*
...and suddenly, it was MUCH easier to be ruthless about getting rid of things. Some trashed; some in recycling receptacles; some in folders, the correct folders in not necessarily the correct order but the priority was getting them out, of, the, way.
Now: more room. And less dust. And a sense of some accomplishment.