For 6-7 years, I've listened to 20-40 hours a week of educational video, audiobooks, articles, etc.

Caught my eye in particular. I also made a habit of finding 30 minutes every day to learn something new online. It typically boiled down to watching a new TED Talk on something I found interesting, followed by 15 min (which often turned into an hour+, lol) of researching whatever had caught my attention in the talk. A great habit that I would recommend to anyone.