My favourite thing to do (and what I do in my "spare time" when I'm "not coding"), is sit on a cafe patio early in the mornings, sipping coffee, reading computer books. I do it at least three times a week for upwards of two hours each visit.
It's mostly books on theory that I read because I learned years ago not to buy books on a specific version of something (because it'll be outdated by the time it hits the stores) - unless it's a language that I want to dive deep into or something completely new to me - like React or Laravel. I find that even "dated" books have relevant material to learn in them.
Most books, provided the content is good, I have read 2-3 times from cover to cover. I literally study the sh!t out of them until I've absorbed and fully understood the material! I even have a colouring system when using sticky notes in my book so I know where to go back to, and why. Over time, most of those sticky notes come out as I start to grasp those concepts and/or incorporate items from the book into my projects, helping me to solidify and know that I understand the material.
I spend a fair bit of money each years on books. I hate that I have gotten rid of many of them over the years because I'd have quite the museum of computer books if I'd held onto them all! I don't know if it's because of not growing up in the digital age, but I simply don't absorb digital material the same way I do as reading a book.
I also learn from watching others work. You'd be amazed some of the cool shortcuts you can learn just by watching someone else work, and when they have a pause in their concentration asking, "hey, that thing you did back there that did this, how did you do that!?" I learned PhotoShop by watching a couple of my former roommate's work sessions and asking her questions at appropriate times.