Doing the best you are capable of doing is victory in itself, and less than that is defeat.
Mistakes come from doing, but so does success.
As long as you try your best, you are never a failure. That is, unless you blame others.
Without proper self-evaluation, failure is inevitable.
I found golf was too time consuming, but I did enjoy it.
An effective leader develops the ability to correctly identify the pertinent detail or details - incidentals in a market, industry or sport that might create an incremental advantage.