In my career I've found that knowning "enough" about a lot of fields (often self taught) has led me to invent valuable things that experts in any given field would have never discovered. Things with many millions in sales.

Also I've found that experts in some field will say something is impossible that I, not knowing it's "impossible", will try to do anyway and find a way to do it by applying techniques from outside the field.

I feel these are my "secrets of success", other than a lot of hard work and persistence. :)