Great idea, i have a 'etagere's and bowls on each surface basically. Most of the time i know where stuff is, if not i know fairly certain in which 'pen' it is. It also really helps to be conscious of where you put something. What i mean is, if you put the thing in the box, look at it and how it 'looks' in the box. +300 to memory of that item ;)

I only started really loosing things since my girlfriend moved in as now she moves stuff around a lot. And we have a lot more stuff lying around