Of course it does. Self-discipline is the best way to get anything done.
An American study has found that a school pupil's self-discipline is a stronger predictor of their future academic success than their IQ, leading researchers to conclude that self-discipline may be the "royal road" to building academic achievement.
Self-discipline also matters in business. You can be smart, but if you never do anything, it doesn't matter. The best way to develop self-discipline?… practice it.