My general method of classroom set-up is to pile everything up in the middle of the room. This makes it easy to hang fadeless, and I make some trash piles in the corners for discards. That went double this year since I was moving my things in and removing almost all of the materials in the room (earliest publication date found on said materials: early 1970s).
Anyway, when I went home on Monday evening the trash piles were gone, the furniture was laid out, and even the packing crates were stored away. That said, before Monday evening the state of the room struck fear into the hearts of all comers.
This is kind of exciting for when your colleagues come by on Friday and are amazed that the room doesn't look like something on Extreme Hoarding (indeed, my mediocre skills at arranging furniture and materials management look incredible when compared to the disaster with which I start). Of course, families coming by for an early look are probably frightened beyond belief.
(Not to mention that classroom set-up is actually physically dirty work - no matter how clean the classroom is, a good day of set-up leaves the teacher grimy gray and probably bruised from a couple of ill-thought furniture maneuvers. This calls for ratty jeans, high school concert t-shirts, and hairstyles that do not inspire confidence.)
Oh well, hopefully they will be pleasantly surprised on Monday.