I just use Google Keep + OneNote + Google Docs as an extensive, interlinked knowledge system. It is very similar to the Zettelkasten method, where Google Keep i

I just use Google Keep + OneNote + Google Docs as an extensive, interlinked knowledge system. It is very similar to the Zettelkasten method, where Google Keep is the “slip-box”, and then once a week I organize and interlink the notes in a more extensive Google Doc system I call my “second brain”. Best part? By default I can search and retrieve everything from my spotlight search on iPhone or Google Drive. It indexes everything really well and you can interlink any part with Google Doc bookmarks and normal HTML links.