Take notes, even if you know you can remember the details without doing so. You can always search or refer back to your notes when you need to return to a topic, and I find that just opening the appropriate notebook jogs my memory
Notes.app is absolutely invaluable to me now, and has well over a thousands entries. It has photos, links and many are shared. I wish I could remember it all.
I’ve been planning to migrate to bear.app for a long time, but have never made the leap.