Discipline is one of the most important traits that a NASCAR driver can develop. It's a huge aid when driving at high speeds on the same consistent line to avoid accidents that could end a racer's day.
But for the stars of Sprint Cup, there's far more to it.
There's also off-track discipline, which can involve anything from adhering to a strong workout routine to effectively managing dozens of other interests. Some drivers own race teams while others own race tracks. Other drivers own businesses that have nothing to do with racing.
It's a lot to deal with, and these 10 drivers are the best at it.