Well, I need to post something, don't I?
AnimesukiThis site provides you with bittorent files of the latest animes subbed. But they don't release any of the licensed animes.
LivejournalInstead of mucking around the crud of fanfiction at FF.net, I prefer going to LJ cause many good writers post in communities, and communities may even be focused on topics you really like, Like AkuRoku shipping, Harry Potter, or even just plain anime.
FF.netDespite all the crappy writers who seem to all follow the same plotlines and with stories full of OCs and Mary Sues, there are some amazing fics hiding in there.
Cosplay.comJust for you cosplayers out there. ^-^
CrunchyrollIt's the Asian youtube, what can I say?
VeohYou can get videos off here too.
DeviantArtThere is just some plain, beautiful artwork up here. It's a real cool place to look at fanart too.
SheezyartBecause it is just plain awesome. It allows you to post flash movies and artwork, and gives you more freedom than DeviantArt does (since you can not use songs you do not own in flash movies). And it just won my heart with this video:
Click this ------>

So, if I remember any more sites, I'll update this list!