Even for a composer, there's more to life than music. Here's a sampling of sites that I find particularly important, or sufficiently amusing.
Language is a wonderful phenomenon. The contributors at Language Log -- notable linguists from all parts of the country, and occasionally the globe -- find inspiration for their linguistic commentary in all sorts of places, from scholarly publications to presidential debates to newspaper headlines to The Simpsons. LL often leaves me wishing I had enrolled in a linguistics class or two during college.
XKCD may be one of the best representations of geek culture, and I don't just mean the computer science jokes and sci-fi references. I mean the mindset that says, "Hey, I just got a wacky idea, and I want to share it with everyone!" "Okay!"