I always thought it would be helpful to have a list of fuses listed in order of what they do. I couldn't find one so I made my own. I have included multiple synonyms for some items that have more than one name. Suggestions are welcome. Feel free to print it out and put it in your car.
(This is for a 1999 Boxster, though not a lot has changed over the years)
After all, if your horn isn't working, isn't it easiest to search alphabetically for "Horns" than "Two-tone horns" or scan the list looking for the horn fuse?
Enjoy.