We need to first ensure the power is off. we do this by switching switch to OFF position. If it is a lamp then simply unplug the lamp. If you have a voltage tester then check socket by turning to acvolts range to 200. Touch one probe to bottom at center of socket. The other one goes inside socket on the brass/metal side. It should read 0volts.

Take your potato and cut in half. Be sure your potato is not to big(even if your in Texas).

Now hold potato in palm with flat wite side down(skin in you palm). Take potato and press white side into socket(be sure to carefully remove any glass before you do this step). Twist potato counter clockwise. Lamp / base should come out in potato. If it does not try it again but I never have to do it twice personally.

Now simply install new lamp( if you have a little dielectric grease dab a small amount to brass side of lamp base and do not torque donw too tight.

Flip swith on or plug lamp back up and PRESTO-LET THERE BE LIGHT!!!