Turn off the power for the garbage disposal where you wish to remove the drain plug. The safest way to do this is by cutting the power for the disposal at the main circuit breaker.
Use a flashlight to locate the drain plug you wish to remove. This usually is positioned on the side of the garbage disposal.
Press a flat bladed screwdriver against the plug. Tap the end of the screwdriver with a hammer. Continue this process until the plug is removed.
Use a pair of needle-nose pliers to remove the drain plug stopper from the garbage disposal.