I've read multiple times about the Zettelkasten and been fascinated by the idea. While I've adopted parts of it I haven't been able to actually use it physically - I'm just too scattered and messy. I think I want to try using a digital version next. An app I stumbled on but haven't used a lot yet is called Zotoro and it shows promise for being a proper digital version of a Zettelkasten.

Thanks for the excellent article about this - probably the best source I've seen on this subject!