I bought a piece of 1.5 inch stiff foam to try to fix a sag in a bed. It didn’t work but having that thick piece of solid foam around has been a life saver.
Need something flat to put a laptop on? Throw it on the foam. Going to be doing something that requires you to be on your knees for a while? Get the foam!
It went from stupid purchase to something I’d gladly replace if it broke.
Mechanical keyboard. Almost had no money back then, but wanted to treat myself. It costed 100$, and I regretted it the next morning. Felt like shit, but it was so cool to type on.
After 5 years, this metal-frame keyboard managed to survive many outside gigs, long travels, literal war, and it’s still with me. And I still love typing on it. Sometimes I code just to type. You can guess why I don’t use code completion tools.