We make sure to put felt under each leg of the furniture which helps to glide it across the floor (not as easy if you've got carpet) and we normally have some kind of a gameplan, but sometimes we just get the urge and start pushing pieces around.
Recently in our studio, we swapped the area we'd been using as an office and made it a living room. Now our desk is a dining room table (with a laptop on it). We have a different view from the computer now, it freed up space around the kitchen and feel more motivated to keep the place clean and consequently can't wait to invite people over.
In related news, now we're attacking the overgrown garden that the cats have been using for their, uh, business. Wish us luck!
[image from YardSale01 Flickr]