I use RSS feeds on my iGoogle homepage (Engadget, Valleywag, Technorati, Gizmodo, Appleinsider, and boingboing). I also listen to a lot of pod/vidcasts like TWiT, Textra, Cranky Geeks, GigaOm, Diggnation, and Tekzilla.
And of course I can't go an hour without checking Digg.