1. Books are heavy.
2. It's a good idea to move furniture before you try and move a large, heavy box down two flights of stairs.
3. No, really, books are heavy.
4. The lengths to which the human body will exert itself when required is quite amazing.
5. Boxes should not be moved on one's own. (Seriously, I'm surprised I'm still alive and intact. I thought I was going to break my knees at one point.)
6. Everything hurts.
That is all.