Playing videogames, reading Harry Potter fanfiction, jerking off to maledom/femsub fanfics and images, watching YouTube videos, occasionally listening to videogame music through YouTube.
Sometimes I listen to videogame music whilst reading Harry Potter (sometimes Persona 5 too) fanfiction, but other times I don't; depends on what I feel like.
Also, I do read fanfiction whilst on the train to uni, whilst I'm having lunch, and so on; really, I read whenever I'm not walking (reading and walking is stupid since it blinds you) or whenever I'm not able to, or feel like, playing games. Back in primary and high school, it used to be books I did this with (primary was mostly Horrible History/Science/Geography; high was the actual J.K. Rowling Harry Potter novels), so...yeah.