Periodic Update of Zettels
Is there a type of Zettel that purposefully asks or invites you to update it periodically? An obvious example would be one where you are taking regular observations of something around you (maybe in the physical world but maybe elsewhere, like say a person evaluating their mental state once in awhile) and where your observations and their addition to a Zettel improves the value of or meaning behind it.
But maybe this kind of Zettel or this approach to writing a Zettel could be used in other ways.
Is this something you’ve thought about or even practiced? If so, could share your application of the idea and how it is working for you?