Cut off electrical power to that outlet. Attach the black wire to the brass colored connection and the white wire to the silver. Attach a green single strand wire to the ground connection. Run the green wire out the front bottom of the plastice cover plate and along the top of a base board. Drill a hole in an outside wall and attach the green wire to a metal water pipe. Do not attach it to a metal gas pipe. If you have conduit, then pull out all of the old wire, and install new wire containing a green ground wire. Turn electrical power back on.