Was going to try to get the rust off my father's crappy old hand plane (since restoring it would get me out of having to buy a hand plane of my own for now), but it doesn't look like I'm going to get that far this week. Spent a couple of hours moving books around to clear some shelf space instead.

Edit: Turned out that my actual DIY for the weekend was fixing my computer mouse, which suddenly developed a tendency to jump the cursor randomly to the upper-left corner of the screen. Turns out that it's possible to kill a laser mouse with cat hair if you get enough of it wedged into the little opening on the bottom of the mouse that the laser shines through. And here I thought fluff was only a failure mode for ball mice.