Time Waster #498: Print 30 copies of a 49 page book, but don’t verify that the "COLLATE" box is checked.
Thankfully I discovered my error before too much had gotten printed, and only have to hand-collate a few pages. (Well, the first 6 sheets times 30, plus put those together with the rest of it.)
By the way, how is it possible that today is March 30th? What happened to March? Wasn’t yesterday March 1st?