XKCD by Randall Munroe, is an incredibly funny and interesting webcomic that updates Mondays, Wednesdays, and Fridays. It coins itself as “A webcomic of romance, sarcasm, math, and language,” and delivers on its promises. What I really like about it is that it features humor on both a level that an average high-school student could understand, and it features humor that requires some more in-depth knowledge (or a quick Google search) to get. It appeals to a large portion of nerd culture, and is quite witty and engaging.
The comic is set up as a series of individual comics with no underlying plot (although there are several recurring characters). It is not uncommon for people to read the whole archive, but it is by no means necessary to get any of the jokes. If you haven’t read it yet click here for the most recent strip.