^Two awesome sites:: http://dig.ccmixter.org/music_for_film_and_video – they have other types of music too. The music is completely free to use for anything, so if you make videos and worry about copyright and stuff, this will work for you.
http://www.freesound.org/ – where you can use and share SOUND CLIPS for free, no copyright, none of that stuff.
This one is exciting to me because I have ALL THIS MUSIC but I don't wanna perform any of it, or mix songs and crap, but I want my stupid talent to be useful for something. So at least I can upload the little musical bits and maybe someone can mix it into their songs or whatever.
I finally found a reason to bother splitting my music up into clips. I could never do it for myself – the editing process is just too boring for me. Same reason I can't write music, just make it. "writing down" music is boring.^