* A very long USB-C cable from an Apple store. I get jealous looks when I break it out to charge my phone.
* Scented candles from Aldi. It's such a quality of life boost to have the place smelling nice. They last ages and cost nothing.
* A creme brulee hand blowtorch. Surprisingly useful! Excellent for lighting aforementioned candles instantly, without burning your knuckles.
* A real P3 respirator with replaceable filters. I've seen the rate that people go through disposable masks. Replacing the filters every few months is vastly cheaper than that! And bonus, it's at least an order of magnitude more effective.