#9 Uh, duh!

#13 If you have keyless entry and ignition on your car, your keys should be stored in a Faraday bag (about $20 for 2 on Amazon) when not in use.

#18 it's made of slate, what they used to use for gravestones back in the day

#47 Reusable ice cube

#17
The 25s would be nice

#9 The basement was somebody's dark room or studio, the light would usually be red in the basement, and when the red light was on no one should enter or the pictures would be ruined.