[Jessica.]

This is the one I use the most.
http://thepiratebay.org/

I started using this one today (free to sign up)
http://thebox.bz/main.php

and my torrent client is utorrent.

I read somewhere that it helps if you close all other applications that use the internet, it gives the torrent client better strength. So like if you close your browser and msn etc.. the torrent download may speed up a bit.