I started reading things that were related to programming but weren't textbooks (i.e. The Pragmatic Programmer and The Mythical Man-Month). Then I started read

I started reading things that were related to programming but weren't textbooks (i.e. The Pragmatic Programmer and The Mythical Man-Month). Then I started reading books on skills I wanted to acquire (i.e. Traction for marketing and SPIN Selling for sales). All of those books lead to recommendations into other books. Listening to podcasts that recommend books increase the breadth of books I'm reading. My wife brings home books from the library and I read whatever she reads (i.e. Hillbilly Elegy and The People vs Democracy), and those lead to other nonfiction books I become interested in. And then there are the "classic" novels I interleave from time to time (i.e. Siddhartha and Meditations). It just starts with maybe a handful of books you are dying to read, try to read for 15 min before bed, and before you know it, you're 50 books into the year!