Wall plug outlet change
Look at each side of the old outlet. There will be copper tabs connecting the two screws that can be broken off. If the tab is intact, then connect them together. 

If the tab is broken, connect to only one of the wires and leave the other disconnected (put a wirenut on the wire. Make sure the nut is small enough to grab onto the wire securely). Make sure to use the wires from the same top or bottom of the outlet.