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.
That’s the issue that so far has kept me from buying a smart watch/fitness monitor.
I’ve had my eye on a PineTime for a while now, but I’m not sure if it’s ready for general consumer use or still an early-adopter kind of product. (Although I’m an engineer, I don’t necessarily want to buy a project in this particular instance.)