To answer my own question, a couple things. Today my wife and I mounted two cat shelves to give our boys a way to get to a high and inaccessible place - my wife got a couple of carpet squares from her workplace and glued them onto two shelves, which we mounted today.

i also recently built a really basic compost bin. baby steps, right?

I haven't started to DIY yet, but after reading Becky Chambers' book, A Psalm for the Wild Built, I started researching mycelium building construction materials and am now several days down a rabbit hole of learning the pros and cons of various mushroom and substrate types. Will I do anything with it? No idea, but it is cool and provides buildings that will last if the natural, casein waterproofing is maintained, but will decompose quickly once abandoned or demolished and actually feed the ecosystem.

Very low-key but very necessary: a shelve and a sweep organizer. Uncluttered the staircase to the cellar

Planning on building a small anemometer and open sourcing as much of it as possible. A small bering holding a rotator and a magnet with a reed switch is how im planning on measuring the rotations. Then it will be hard wired from there to a base station with an old raspberry pi that i have and a small display for recent data. Ill need to update the pi if i want wifi so i can stream data to a server constantly but this seems like a good start, upgrades can be made later.

Trying to figure out how my heat pump supposedly supports WiFi... in unfathomable and non-standard ways. It's available as an access point, I can associate and ping it, but no TCP ports listen and no UDP port responds. Nothing cool, undocumented features down to the rocky bottom. When you buy a heat pump and plan to automate its use, check out supported protocols before making a decision. :)

Replaced about half the old cast iron pipe from kitchen to the clear out the week before Christmas. Gotta replace the rest next but I have to take down the ceiling of the laundry room to do it but we're doing cloth diapers with our baby so losing the laundry for even a day isn't a great option right now.

Not a big or wild project, but my sister had an LED light strip attached along her wall which stopped working. Did a bit of troubleshooting and found that the strip had torn near the connector. So I soldered the connector wires to a new segment of strip and fixed it :)

i recently built a photoframe using a display, some wood, wood glue, and a pi zero :))