Rooms won't get clutted up if people put things back where they belong as soom as they are finished with them. At the end of the day, everybody just take 5 minutes and do this, and it won't become a big mess.
Only bring things into your house if they have a predetermined place. Throw out anything that is already in your house for which you can find no place.
I go through all of my items yearly and have a garage sale. It brings in extra income and also clears out my cabinets and drawers with what I use. Have some containers and put items in their place after taking them out. It makes it easier that way and you don't have to pick up.