Sit in front of the outlet and look at the fixture. Determine if there are any screws on only the outside of the cover, or if they're screws only on the inside, by opening up the cover and looking for screws.
Remove any external screws using the Phillips-head screwdriver or the flathead screwdriver, depending on the style of screw used for the cover, then pull off the cover to complete the job. Proceed to the next step if the cover doesn't come off.
Using the Phillips-head screwdriver or the flathead screwdriver, open the outlet cover and remove the screws holding the cover to the wall or outlet . Pull the cover off the wall and the outlet, allowing you to work on the outlet.