I always hear people say, "I am not self-disciplined" enough.
Sounds like a reason to explain why we fail to accomplish our goals, but if you think deeply about it, you will find that the real reason is not that we are not self-disciplinary or we don't have enough willpower.
Those who manage to read books every day don't consume willpower to do so. They are just readers.
Those who rise early and run every day don't feel friction to do so. They are just early risers and runners.
Let's break the myth and focus on the real issue.