Use shelf risers so you can keep two nice, neat tiers in any cubby-sized hole.
Hang your shelves upside down so that the brackets automatically create built-in compartments.
Hang an upcycled cereal box on the refrigerator to keep your menus and fliers in order.
Attach a command hook to the side of food canisters for easy scooping.
Use pipe straps from your local hardware store to make a cheap and easy utensil holder.
Use doorknobs to hang up individual shower caddies for each member of your family.
Tension rods make easy scarf hangers.
Put up a wire shelf in the dead space of a closet to corral wrapping paper.