What are some nifty websites that you can't live without?

I love Tee Magnet. It keeps track of the numerous "Shirt a Day" websites that have some awesome things come across them, distilled into a single fantastic site I can check first thing in the morning.

Mark Watches along with Mark Reads are the blogs of an amazingly awesome guy who digests television/books he's never seen before a chapter/episode at a time. It started out as Mark Reads Twilight, where he basically tore the book apart, which he followed by Mark Reads Harry Potter, wherein he fell in love with the Harry Potter novels. He's done quite a few popular series (he is currently finishing up Lord of the Rings, about to start The Princess Bride on Mark Reads, and Mark Watches is smack dab in the middle of Buffy The Vampire Slayer and Angel.)