For me it's not really about picturing a room, but coming up with the vivid transitions between objects.
Ex. For wolf, orange, hail; I might picture: The wolf sitting on top of a house, and when he opens his mouth it violently rains an infinite stream of oranges, then when gravity kicks in the oranges start falling from the sky turning into huge balls of hail.
The imagery like hundreds of oranges pouring out of a wolves' mouth, and oranges falling from the sky like hail are what do it for me. I've used this technique for lists of 20-30 somewhat unrelated items effectively.