An expert is an expert in his or her field and there are those who say being an expert is a limiting vocation. Realising that I don't know everything of one single thing brings my feet firmly to the ground, and therefore means I know a little of many things.<br />
I'm no expert :-)<br />
My highly developed intelligence, quick wit, stunning personality and complete humbleness. :P
Studious avoidance of mistakes in the first place.