Someone once asked how I keep my drill press chuck key handy.
I bought one of those round donut shaped magnets with the chrome cover and a ¼"x1" metal spacer at the hardware store.
I drilled and tapped a hole in the side of the spacer tube and attached to the magnet with a small screw.
Nothing fancy, really.... there are probably easier ways to do it.... it's just what I did.
Those of you with a keen eye will notice that this picture is of my older drill press (model 14-070) not my current one (model 17-965).