Experiment

Here's something pretty crazy for you to try. I used to do this all of the time when I lived out in the country. It made it easier with no sound references. Sound and light references will make this a hard experiment. What you do is lie in your bed at night and close your eyes. Clear your mind of everything but your room. Picture it in your mind as if you were looking at it from your current position, not standing up. Once you have the orientation down, change the image in your mind so that the room has rotated about you and your bed. For example, if the north wall in your room is on the normally on the left, picture it in your mind as being behind you, and so on. You have to concentrate really, really hard to convince your mind that you and your bed are oriented differently than you really are, but it's possible. Picture it clearly, everything in your room. Try moving your head to your left and picture what you would be seeing, not what is actually there, then do the same to the right. Things like Windows and doors are really good references. Look with your head at where a door or window would be in the rotated room and work out from there. Once you have thoroughly convinced your mind that you are facing a different orientation, and you can see a clear picture in your mind, looking in all directions, you are ready. Now open up your eyes and you will see the room spin back into place, to it's real orientation. It is quite an experience. It sounds unbelievable, I know, but really does work if done correctly, and it is a really neat experiment of what the mind can do.