Have clear goals; understand the steps it will take to achieve those goals; work hard and focus on each step; keep the end goal in sight.
To be honest, I'm not that sure on which one it is, but given choices lead me to think is the nervous system, probably because that's the reason our bodies are functioning, and compared to all other systems, the brain and the nervous system are needed for survival, otherwise you wouldn't be living.
a skill people use is to look at their emotions and feelings/thoughts
