Hulu is incredible. We first started using it about a year ago back when you had to sign up in beta and wait to be allowed access, now it is available to everyone. It's a website designed to maximize your happiness, or more specifically, to stream tv for free (about four 30-second commercials per 40 minute show) from several different networks and even old movies!
Some of our favorite shows to watch on hulu? Arrested Development, 30 Rock, The Office, Heroes, and Bones.
Quick vote: Hulu has changed our lives.