The Google Jedi Mind Trick
Okay, so are you looking for an MP3 file you just can't find? Well, search no more.
Type this string into Google.
-inurt:htm -inurt:html intitle:"index of" mp3 [song or author]
Where you just replace [song or author] with whatever you're looking for. (No brackets necessary, but "index of" must be in quotes)
(h/t, "Freddy Krueger")
UPDATE: (by the way, this post is staying at the top for today, so you might want to scroll down and check for new posts)