Comment by 6gvONxR4sf7o

Textbooks in general (like academic textbooks, not orielly style books). Work through a textbook or three each year, and once you’re a decade into your career it’s like you have another degree under your belt. Find something you want to dive deep on and instead of reading a dozen blogs, buy the textbook and do some of the exercises as you go. It keeps you spending time in foundational stuff rather than specific frameworks, and it pays incredible dividends. It’s slow as hell, and only really pays off on many year timescales, but don’t discount it for that.