Adding an aux in cable to a stock, crappy Honda AM/FM/Cassette radio.
Got a car with a crappy AM/FM cassette deck? Or even a CD player? Who wants that crap, all we really want is a freaking aux in to play MP3s/Pandora/Spotify from our phones these days.
Well, here's how to do it using a soldering iron and solder, a spare stereo cable, some Sugru, and a switch (source it free from some piece of electronic junk around your house).
Other tools used include: needle-nose pliers (Leatherman), a small phillips and flat head screwdriver, and a drill. Note: you can get away with less equipment the more ghetto you make this :).