How to tell that it has been far to long since last you cleaned your room:

1) Stuff actually sticks to the floor when you try to move it.
2) Your broom has more dust on it than any other place in the room.

Now, the first one was actually true and the second one was a close call. I definitely need to clean more. To my defence, though, I haven’t been home that much over the last month or so. Still, that doesn’t really justify it.

Word of advice: Don’t let it happen to you!