I've just recently noticed that my organization scheme for certain things was determined pretty arbitrarily. I keep my wallet, keys, change, Chap Stick, incoming mail, and pens on a counter in my kitchen area. Why? Because when I moved in, I needed a place to put my wallet, and I didn't have any better place to put them, not having any sort of furniture. It's not even a convenient place to keep them, because it's out of the way of everything, unless I start dinner as soon as I get home from work.
In my living room, which I just use for storage because the real living room is the master bedroom (which contains no bed), there's a little alcove where I have a wooden chest. It's there because it's big and annoying, and the dimensions of the alcove happen to almost exactly match those of the chest. On top of that chest is a lamp, because when I was unpacking, I didn't really want to do anything with the lamp, but I didn't want it damaged, either. So, it's sat there for over two years, never once plugged in. Also on the chest are my light backpack, which I take to work most days, my camera backpack, and scattered camera equipment and a tripod. It's there because I keep my Segway over there, and those things (except the lamp) I generally only use when I'm going someplace. The Segway only lives there because I randomly chose that spot when looking for a place to plug it in to charge it.
I have a lot of organizational habits like that, it seems, with the locations of all sorts of objects snowballing from small, insignificant decisions I made long ago. Then again, the time and space that I would save from finding a better way to store these things probably isn't even worth it.