While we are not in the habit of recommending you try to do electrical work yourself, there are a few relatively simple things that a non-professional can do.  One is changing a light switch.  Of course, if you are uncomfortable performing this simple tasks yourself, call a professional electrician.  Here are the steps:

  1. Turn off the power by firmly moving the breaker to the off position.  If your breakers are not labeled, you will need to test each breaker until you find the right one.
  2. Unscrew the cover plate and switch.  Pull the unit straight out to access the terminal screws. Confirm that the power is off by touching the terminal screws with a voltmeter.
  3. Note the colors of the wires that attach at the terminal screws.  Use your cell phone to either take a picture or type in a note so you will remember how the new switch should be attached.  A black wire usually attaches at one side, and a different color wire attaches to the opposite side.
  4. Loosen the screw terminals and remove the wires.  If there is a ground wire, remove that as well.  The wires may be fed straight into a slot in the back of the light switch.  If so, you can pull them out using a screwdriver head.
  5. Connect the wires to the new lights switch.  Curl the wire around the screw terminals to ensure a strong connection, and then tighten the screws securely.
  6. Screw the light switch back into the electrical box.
  7. Test the switch to make sure it is wired correctly.
  8. Once you have confirmed that the switch is installed correctly, reattach the face plate.