Camping World also sell a thin piece of rubber that is adhesive on both sides. It leaves no residue and will stick to any clean surface and small items will stick to it. I stuck a piece to a vertical spot on my dash and then stuck my sunglasses to it; I got tired of waiting for the glasses to fall and took them off. It's a little pricy, about $10. 00 for 3/4 of a sq. foot but really neat stuff.
Dave