Headphones

I'd be lost without mine, honestly. I use over-ear headphones when I'm studying because they block out the noise from the street, and a small pair of earbuds when I'm out because they fit in a pocket. Sound quality matters to me less than comfort — if something presses on my ears after an hour, I stop using it no matter how good it sounds. I am a bit wary of wearing them while walking near traffic, though; you lose your sense of what's coming, and I've had one or two near misses.