Old-timer trick – Gravity
When you are fishing a wire through a hole in the top plate of a wall down to a junction box, use a piece of chain. Drop the chain in the hole and lower it down to the cut-out hole in the wall below. Attach your wire to the chain and pull the wire of the wall.

Knock out removal
Knockouts are usually pretty easy to remove if you are working from the outside of a junction box. If you can only access a knock out from the inside of the box, drive a self tapping sheet metal screw into the knock out and use your lineman pliers to wiggle the screw back-and-forth to remove the knockout.

How to change an Electrical Receptacle (i.e. Outlet)

1) Always turn off circuit breaker

2) Check receptacle with beeper tool or volt meter to make sure electricity is off

3) Remove existing outlet in this order 1) Remove colored wire (Note: The colored wires are referred to as the hot wires. They are usually colored black, red or blue) 2) Remove the white wire 3) Remove the ground wire

4) Install new outlet in reverse order: 1) Install ground wire on green screw 2) Install white wire on silver screw. 3) Install hot wire (Black Red or Blue) on brass screw

5) Make sure all unused screws are tightened

6) Push wires into box with VoltClaw and screw in the outlet

7) Turn breaker back on and test with three-prong tester or voltmeter