When you notice you’ve got no knowledge about a subject, but you think it’s valuable for you to have knowledge about. Create an action for yourself to learn about it and the next time this subject comes forward, participate and learn.
These moments are valuable for you to grow. We tent to read books or information that is populair or recommended, but it almost never is directly beneficial to you. The moments you know you don’t have knowledge but you want to learn about a specific subject are very important for you to grow.