Folks often think of Tana as having a "steep learning curve." And I get where that comes from it's flexible and powerful, so there are a lot of different ways to set up workflows. But there's a specific relationship between supertags, fields, and searches that is simple to learn that I consider my fundamental Tana LEGO block.

It works like this. If I want to see how two things relate say, books and authors I first create supertags for both. Then within the #book supertag I create a field called "Author" that draws its options from instances of the #author supertag. And in the #author supertag, I create a search called Books that finds all books by whatever author you're looking at.