I have another to add to the (bookmarked) list: Dark Roasted Blend
This site hosts a collection of seemingly endless links to trivia, interesting photos, art, videos, etc. If you have time to waste (or assignments to avoid) visit it.
If you need a laugh, check out this site. You know when you send a text in a hurry, without realising that your phone has autocorrected your typing and changed the entire meaning of your message? This site documents the funnier autocorrect fails that have happened. Just a warning; it can be profane at times.
I hope you guys find these sites as entertaining as I did, and if you're anything like me, I apologise in advance for the hours wasted on them. Enjoy!