I take computer hard drives apart and use the magnets for various purposes. I often leave the backer plate on as it allows me to mount it to wood with a screw.
Door Curtain.jpg - We have a metal door and I didn't want to drill holes to mount the curtain rod so I taped the brackets to magnets. The tape keeps the magnets from scratching the paint on the door.
Clothes Hanger.jpg*– On the cold air return ductwork in the laundry area to hang up an item or two.
C Clamp.jpg & House Chisels.jpg*– Attached to the underside of floor joist.
Cord Keeper.jpg*– Attached to my table saw to keep cord off the floor and out of the way.
Hammer.jpg*– Attached to the side of a garage stud