What is the Dunning-Kruger effect? It states that when you know little about a subject, you feel really confident because you do not know about how much you do not know. On the other hand, when yo have a finer grasp on a subject, you might be humbled by how much you don't know.

Once you start looking out for this pattern, you should be able to take better decisions for maximizing whatever it is that you are doing.