YouTube (though I hate many things about it)
Some tech and gaming news sites every now and then
4chan and other anon imageboards (though I don't get it, I'm not a part of their community or anything, I just look at it.)
Facebook sometimes. I'd say it's kind of peer pressure and what if someone uploads a pic of me? I would want to approve of it first.
Spotify (not a site, but it is a computer internet kind of a thing)
mp3skull and other music sites for downloading etc.
Google Translate and Maps
Giantbomb.com, it's like Wikipedia but about video games.
ohinternet.com and knowyourmeme.com, just to keep up with internet trends and current events and stuff.
I'd say that's about enough sites, I don't want to get more addicted than I already am.
I kinda like your threads, SKS, they are interesting. Maybe I'm just weird.