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.
I have a S10 and I use Bixby routines to turn the ‘Protect battery’ feature on over night, which limits the battery charge to 85%. I have it set to turn off about an hour before I wake up so that it’s fully charged in the morning.