Those of you that have the little light above the glove compartment know how easy it is to ground the hot part of the light against the dashboard metal when you remove the light. I have lost count of the number of fuses I have lost that way. Oh sure I hear you say, why not disconnect the battery before removing the light? Well, yes, of course.
But, you can do something else. Slip a bit of heat shrink tubing over the flat metal inside the light. Shrink it up and your good to go. Here is a pic (I have a LED festoon replacement light in there). The light green is the heat shrink over the metal strip.