A pair of power-splitter cables for my multi-disk computers and a new enclosure for an external. SSDs run on so little power that sharing a power line is no big deal for them, and you can almost never have enough externals around, to keep all that precious stuff stored and safely away from the evildoers (thanks, W).
Some keyboard switch grease, keyboard switch opener and switch films. Greased and filmed all of the switches on my mechanical keyboard. They sound and feel way better now. Tedious (87 switches) but worth it. Took 3 days all told - could only do a row or two at a time without killing myself. My wife thinks me a real nutjob.