Nothing too specialized. I use Google Bookmarks to "queue" up readings that I want to review; generally I don't let this exceed ~10 (otherwise I know I'll neve

Nothing too specialized. I use Google Bookmarks to "queue" up readings that I want to review; generally I don't let this exceed ~10 (otherwise I know I'll never get to them). I use Google Keep to jot down raw thoughts/notes (e.g. if I'm learning a new concept or hear something interesting on a podcast) throughout the day. Then, every weekend I review all of these notes (say between 10 and 60) and "structure" them into organized domains (e.g. sociology, biology, finance, psychology, history) and clean them up before putting them into OneNote. I generally don't check my OneNote so often - except if I know I have notes related to a topic and I'd like to review them (say antifragility or neural annealing) - but the two-step process of writing down the notes, then revisiting/refining them later tends to aid my retention substantially. I'd say during an average week I spend about 1-2 hours on this process. Sometimes, if I've been inundated with new information, it can be up to 4-6 hours, especially when I have a lot of queued readings to go through. Overall though I've considered it well-worth the investment.