Familiarity - Follow communities and discussions, or try things and see how they go. Spend some time passively reading. Books are good. Videos typically have a

Familiarity - Follow communities and discussions, or try things and see how they go. Spend some time passively reading. Books are good. Videos typically have a low time to knowledge ratio as they pander to the YouTube algorithm. Projects are fantastic, but they're mostly tech-based. Spaced Repetition - For concepts that don't appear regularly enough to be familiar, but are still useful enough to be in short term memory. Knowledge Management - I have a personal knowledge management system based on recursive concept definitions. I define my knowledge at the highest level that I understand, and let the concept definitions fill in the first principles that I forget; I intuit that the current crop of note-taking apps aren't working on the right level, but haven't had the time to productionise my setup, and I'm happy enough that I'm not going to look for something better. I suppose this is also an application of the Feynman method. I keep papers in Zotero for reference. Forgetting & Ignorance - A lot of knowledge isn't valuable enough to me at this stage in my life. It's a shame that I'm not going to have an appreciation for the Roman emperors, but that's OK. Time is limited and it's important that you don't spend too much time on theory at the expense of practice. Reading the answers here, I should aim to join more discussions