We moved Son #4 into his own room last week. It had been the sun room, used for miscellaneous storage. Yesterday I moved the last big thing out of his room--my filing cabinet. It is now right behind my desk, meaning I file things the second they're ready--not weeks later, when I walk into the storage room. This is an awesome development.
It also required that I move my desk, which meant that I needed to move the couch...if you give a moose a muffin, he's going to want some jam to go with it.
So now I have a larger, more comfortable, organized office, and a smaller, more cramped official living room. I am bucking for a total removal of the living room furniture, since we never really use that for guests, anyway...some day.