If I put anything on my wall/desk, it'll be gone by tomorrow. I can't stand having papers not in a folder or something/having my walls look cluttered. Massive neat freak here.
As an example of how bad this is, I used to have a tally sheet on my desk with how much my roommate owes me for rent/util and now I have no idea where that is, and the amount I am owed is no small sum. It is lost in a random folder, cuz while I may care about neatness, I am the opposite of organized.
I need some annoying shit that will pop-up and interrupt what I'm doing. If its a file or something, I'll just forget about it.