What do people need to understand? What are the edges of the map or diagram? What are you not mapping or diagramming? Where will other people see this map or diagram (e.g., on a wall, in a presentation, on paper)?

When architecting information, focus on your own unique objectives. You can learn from and borrow from other people. But it's best to look at their decisions through the lens of your intended outcome.

How long would you spend on a task without understanding why it's important or what you are actually accomplishing?