• www.shanaproject.com: register anime you want to download, from which team and format, and it will create a RSS feed that you can use later
• nyaa.si: useful if you want to find movies or old stuff
• One Pace: One Piece with less fillers.
• Anime Filler List: Not a torrent site, but useful if you want to watch old series (like Detective Conan or Naruto) without the fillers.

I’m using flexget to automatically download from RSS, but it may be a bit hard to setup.