I'm usually out observing the natural world when I get blazed, or at the Wal-Mart grocery store next door getting my munch on, but my own room is well equipped to handle a few stoners:

A bed and multiple pillows on the floor
A 30 inch TV
An Xbox (if you have any music on your Xbox, listen to it, and watch the cool little color thingy. Guaranteed to trip you out.)
A GameCube, hopefully with a copy of Resident Evil 4, as it will scare you shitless when your high.
A lava lamp.
A pathetically small mini-fridge that can hold four sodas.