See Gary Bernhardt's "Wat," at https://www.destroyallsoftware.com/talks/wat, for far more interesting or lesser-known JS facts than you ever really wanted to know.

Find something that bothers you about a site you use a lot, and build a Chrome extension to fix it. (Hiding the Moments tab on Twitter is a good start.)

BASIC, summer 1978. (My dad wrote the Atari BASIC Reference Manual with Carol Shaw; I was the kid they got to enter and run all the program listings.)