Discipline is based on pride on meticulous attention to details and on mutual respect and confidence. Discipline must be a habit so ingrained that it is stronger than the excitement of the goal or the fear of failure.
I just go where my heart tells me where my gut tells me to go where I'm enjoying my life the most where I feel like I can have the most success. I've truly enjoyed my experience in NASCAR to the point that I want to do it full time.