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.
Most modern android phones now use adaptive charging. If you set an alarm, it will adjust the charging time to finish a little before it goes off. This minimises wear on the battery, while also guaranteeing a full phone in the morning.