How do you take a photo of your camera from its own point of view?

Here is one of the more complicated (but fun) ways to do it:
Carefully align your camera, so it is facing the back side of another lens that is set in front of the wall mirror, while another, smaller, mirror is behind the camera angled to show the camera itself. On top of that, you could hold another lens in front of you, positioned precisely to show your whole face in it.

It may be a good idea to rotate the whole picture upside-down, countering already flipped from that first lens in the lineup.