Some people already may know but found out using google to search for files can be useful.
search something along the lines of.
intitle:"index.of" (mp3|mp4|avi|divx) song.or.movie -html -htm -php -asp -jsp -shtml
The intitle part makes sure 'index.of' is in the title, which is usualy in the title on index's of files.
The '(mp3|mp4|avi|divx)' makes sure their on there, add your own, just some exampled.
'song.or.movie' searches like you would, you could put anything in there that your searching for, use '.' instead of spaces though as that makes it possible to search for 'song_or_movie' or 'song-or-movie' or any combination.
'-html -htm -php -asp -jsp -shtml' makes sure your results don't show pages which probebly arnt index's of files.
Some people, or maybe alot of people already knew about all of this, but i recently found out and have done some searching and it has picked up a few things for me. Give it a go.
/Ash