Without a good dose of discipline, you have less concentration, and consequently, this leads to more distraction. And more distraction leads to a lot more time wasted. 

In short, without discipline, you will never reach your goal.

You can also be a person who organizes his time well, but if this organization is not related to greater discipline, you will never achieve great goals. So instead of figuring out how to organize your time, focus on optimizing the time you have to achieve your goals.