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.
Depending on what you want to use it for, you may be able to set it to another location in your country. I’m in the UK, and setting mine to London or Edinburgh gets around a lot of location blocks for some reason.