It's not something you give much thought to, most people never consider replacing their power outlets or light switches unless it's for redecorating purposes. But sometimes there is a real need to do this, especially if they are worn out and becoming an electrical fire hazard. Worn out receptacles can be annoying if they quit working sporadically.
Replacing these isn't expensive, you can pick one up for a couple of dollars at any hardware or home improvement store. When you're ready, be sure you turn off the power to that switch because you do NOT want any electrical shocks or burns. Test to be sure the power is truly off with a circuit tester.
Here's a rough step by step on how to replace your outlet receptacles.
1. Remove the outlet cover and then unscrew it from the mounting.
2. Pull it out of the box so you can work with it easier. If you're not electrically inclined it's best to label the wires so you know what location to put them back to.
3. Disconnect all the wires and remove the old outlet.
4. Be sure your new outlet is rated for the circuit you're on. Reconnect the wires as instructed with the directions.
5. Put the outlet cover back on, screwing everything in again.
6. Test it for power.
What if you need to replace a light switch? This is not a difficult task either and the replacement part is also inexpensive.
Again, turn off the power to work in a safe environment. Repeat steps 1 through 3 from the outlet replacement above. This time be sure to mark the white wire as being hot. Disconnect the wires from the old switch and attach them to the new one. When everything is secured and screwed in tight, push the switch back into the receptacle box and replace the cover.
