GFF - Only decent forum I know of. I used to visit the official nintendo forum regularly but it's gone.

animemusicvideos.org - It's the only good place I know for AMVs and I used to make them often.

Yahoo - For my mail needs. My ISP e-mail gets too much junk mail now.

Station 8 - Gargoyles fansite, the only one that seems to be updated anymore.

Right Stuf and Amazon - Basicly the two places I order all my DVDs from.

RSF - It's a forum based federation for the Smackdown vs RAW series on the 360.

Youtube - You can find basicly anything you want on there.

play-asia for games
amazon for books
facebook to kill time
google for spelling check

GFF - I love the community and the possibilities to download game music :P
GMX - My eMail provider
Animexx - A German community site for japanese culture
wow.gamona.de - German fansite about World of Warcraft. I quit the game but like to know what is happening there
aoc.gamona.de - German fansite about Age of Conan
GameStar - for news about computer games
Gamezone - for news about gaming in general
Google - have I say something about it?
Wikipedia - same as Google
Gaming-Universe - same as Gamezone
Anime Loads - streaming anime with German dub or sub
anime-fansubs.de - for German anime fansubs
leo.org - German - English dictionary online
BlizzPlanet - for news relating Blizzard worlds
Digital Blasphemy - wonderful computer rendered wallpaper
gamemp3s.net - <3

and some others (MMO guilds, blogs, etc.).