Cut a Piece of Aluminum Foil
Instead of making do with dull craft scissors or pinking shears, try this handy sharpening trick.With the scissors or shears, cut through a sheet of aluminum foil that has been folded over for double thickness; they should regain some of their sharpness and last a while longer before you have to replace them.
Sandpaper Works Too
Fold extra-fine-grain sandpaper, with the grain facing out on both sides. Then make several clean cuts until you feel the blades have reached the desired sharpness. Wipe blades with a dry cloth before using.