Physical 4x6 index cards (organized with the zettelkasten method—https://zettelkasten.de/posts/overview/ https://zettelkasten.de/posts/overview/) and correspond

Physical 4x6 index cards (organized with the zettelkasten method—https://zettelkasten.de/posts/overview/ https://zettelkasten.de/posts/overview/) and corresponding digital version in Notion