This is all well and good, but what is the fix? I am aware that there is a lot of stuff I don't know that I don't know (boy is that a clumsy statement) but what

This is all well and good, but what is the fix? I am aware that there is a lot of stuff I don't know that I don't know (boy is that a clumsy statement) but what steps to take to avoid the whole Dunning-Kruger effect? I don't want to deprecate myself, but at the same time, how do I go about finding out what it is I don't know I don't know? (!?!?)