The half credit card was an old one which I dutifully destroyed. That account no longer exists, so there's no point hiding the number.
The infectious waste sticker is a real one. This is the sort of thing you pick up when you hang out with medical laboratory folk.
The photo I found on a hallway floor at a convention. It was apparently part of a LARP.
You'll note that this is the inside cover of the notebook. Only one more day to go!