What does not reduce resistance in a copper wire?

-- winding the wire into a coil

-- changing its price

-- tie-wrapping it to the outside of a conduit

-- shining a flashlight on it

-- exposing it to loud noises

-- changing the color of its insulating jacket

Resistance will only be reduced by changing the thickness / physical dimensions (15 small wires wound together vs 1 big one, etc.) of the wire, or the wire's temperature. It's apparent impedance can be changed by placing it in an electric field as well.