Today, I finally figured out what was wrong with my Raspberry Pi. It worked before, connected to a TV, without ethernet, and with a power supply and keyboard borrowed from my brother. When I got my own accessories for it, though, I found the USB ports and network were dead.
Well, today I finally got around to some debugging, and found that the faulty part was the USB cable between the box and the power supply (i.e. a phone charger). Don't ask me how much I spent diagnosing that. Luckily, I can easily get micro-USB cable, even on a Saturday. (Okay, not nearly easily enough, but I did get one.)
Hooray! A working computer! Let's try new things with it!
I've used apt in Ubuntu for quite some time, so I thought Raspbian would be too
boring, and decided to go for Arch. So far it's been working nicely.