Today I've read all my webcomics, etc etc, and it's only 9:30.
Sites I read in a day's time:
webcomics (on the sidebar of my Friends page), Slashdot.org, theregister.co.uk, engadget.com, autoblog.com, Anandtech forums, and the Fatwallet.com HOT DEALS forum.
Also I have RSS feeds for many things, including Boingboing.net, all of warren ellis's random stuff, MakeZine, HackADay, and a few others.
What sites do you browse on a daily basis?