Let's see...
- Youtube. I spend ridiculous amounts of time on Youtube. It's basically my iPod substitute. Open up Youtube, listen to something, switch to another window, do whatever there. When the song's done, restart or switch to another song. And repeat for hours.
- A forum which I'm not allowed to name because of the admin's utter trollophobia, and especially because I'd probably lose mod status there if I did. Thankfully the members there are mature enough to not make modding there feel like a second job.
- Webcomics, although I just started getting into those...what, 2 weeks ago?...so I haven't really seen enough of them to give a good recommendation because it'd probably seem bad in comparison to another one I hadn't seen.
- The Escapist. I'm probably one of...well, almost nobody else...who joined Escapist's forums after Yahtzee and not because of Yahtzee. Don't get me wrong, though. Zero Punctuation is awesome.