"Big Bang Theory" on TV. If you don't watch it, you should. Monday night, CBS, 9:30. Unfortunately it doesn't seem that full episodes are online anywhere for free, just clips. Or you can buy the first season on iTunes.
I watched sporadically during the first year, but it has really found its rhythm since then. And thanks to the exceptional comedic talents of Jim Parsons (http://jimparsons.net) who plays Sheldon, it has become one of the funniest shows on TV.
One of my favorite episodes from Season 2 featured Penny starting a business making hair clips and then the boys get involved to "improve" it. clip: http://www.youtube.com/watch?v=-gkGa5j9N1M
Here's an interesting clip of Parsons on Letterman