I went about shifting boxes between shelves to get them in the right place, emptying and flattening boxes for recycling, putting things away, and throwing out a metric ton of assorted stuff of no value, such as fouled packing material. And then I realized that we hadn't quite finished carpeting the basement.
There was a little tiny patch of trim on each side of the staircase that still needed to be filled in. Fortunately, I had bunches of scrap material, so a few quick cuts later, I was able to fill in the holes and glue the patches down.
Now the carpeting's done. :) (It had better be...)