Think big when adding things to your Brain:

Parents

Find parallels and similarities; think about larger categories. Soon you’ll have rich variety of things under Unintended Consequences.
Set opposites near one another (I use jump thoughts): will AI save us or destroy us? does foreign aid help or hurt? how?
What are the major insights of the article I’m about to add to my Brain? What does that connect up to? Who else addressed this?
Where does the product I’m adding to my Brain fit in that company’s product history tree? What products compete with it?