I don't think I get online a lot [at least nowhere near as much as I used to] when I do, these are the sites I have on my bookmarks that I visit when I can.

Windows Live
DeviantART
YouTube
MyAniméList
Xbox360voice
Flickr
SuperHeroHype
isoHunt
xkcd
Saturday Morning Breakfast Cereal
Joyce & Walky
Danbooru
GameFAQs
TV Tropes & Idioms
Pure Filth
Eyes on Final Fantasy