There is nothing new to talk about what self-discipline can bring us in our life. I guess, more or less we all know how beneficial self-discipline can be. But the problem is we don't take it seriously in our life.
Ask yourself, how routine your life is. Nowadays, people nag; we are not a robot. Well, self-discipline actually doesn't make you a robot but a better human. Just take an example from any famous person from any discipline, you will see how routine and disciplined they were in their work. Well, maybe not in their personal life. That's why, if you want a well balanced personal and professional life; self-discipline is a must
The best thing about self-discipline is, you don't have to put much effort to incorporate this in your life. Our intention can take us a long way. You have to understand, realize, and be passionate to improve your life. And this intention will gradually reflect in your daily life.
From waking up early, making a routine to living a healthy life; everything comes with self-discipline. It gives you more control over your life. You become a better decision-maker, you can process your emotions more effectively and most importantly you become the boss of your life.
When you have a 'blueprint' in front of you, it's easy to follow the path. This is what self-discipline brings to us. It gives us a clear idea about life, where to invest time effort, and money, what to skip, and how to live life.
Start with making a few discipline/rule in your life and gradually move towards making a big change. I hope it's gonna help you!