A great comedy website, they have new content added every day with funny lists, videos, blog columns, and contests. Always manages to give me some laughs whenever I go there.
Awesome group of video game people, they make game videos and skits, sell their show on DVD along with merch and have a weekly podcast which I love.
My favorite webcomic series, has a very specific brand of humor.
Funniest wiki on the web, period. Look up anything, there is some crazy article about it. Kind of like Wikipedia on crack.
Great video game site, a very reliable place for news, videos, cheats, tricks, and reviews of games from all systems new and old.
If you want to know anything about anything, this is the place. The definitive sum of knowledge on the internet. I spend too much time on here. Warning: once you begin a wikipedia quest, you can end up following links for hours and hours...