Radiate heat: "Wrap a piece of plywood in foil and tuck it behind a radiator to reflect heat into the room." -- In my home I've used (hid) a 'car's windshield reflective sunscreen' behind my sofa to protect the fabric from the heat of a baseboard heating system (older home)- Doing this has, also, served to direct the heat up over the sofa into the room.
Magic Eraser uses... did you know you can cut a piece off and float it in your toilet overnight and voila! no more toilet ring! -clean window screens (even when they are still in the window) The website has a list of about 100 uses!