I've even watched some shows on youtube. They'll be broken into 10 or 15 minute chunks, but they still work fine. Usually, I only resort to this with something that is really hard to obtain, like BBC sit-coms (Murder Most Horrid) or PBS shorts (Posh Nosh).
Some shows I just love to re-visit, like Arrested Development or The Tick. I can watch those instantly on hulu.com or Netflix. By the way, I don't understand how The Office can be such a big hit, when Arrested Development barely made it. Arrested Development is almost a hybrid, between the typical family-centered sit-com and the fake documentary-style TV show, like what we see in The Office. And even The Office wasn't the first to do this. Before The Office(British or American), there was People Like Us, also from England. It was part of the late-night British sit-com lineup for PBS here.
If you want, you can even buy lots of these shows. Absolutely Fabulous or Black Adder are both hard to find, unless you purchase the dvd sets.
There you are: lots of suggestions for entertaining time-wasters. Here, I'll get you started. This link takes you to a bit of People Like Us on youtube.
http://www.youtube.com/watch?v=E_VND1196WI