I love Duolingo. I’m not always using it, but when I do, I really go at it. It’s the best way to learn another language. I don’t always have a chance to read a book — say while I’m running or on the go, so instead of listening to music, I’m listening to some of my favorite podcasts (e.g., Radiolab, Bite, Invisibilia, Note to Self, Tiny Spark) or an audiobook on Audible. Basically listening to books has allowed me to “consume” around 3 more books a month. It’s quite addictive.