This book Hyperfocus: how to manage your attention in a world of distraction, by Chris Bailey, teaches us how to be focus and dismuss distractions. Better say, how not distract and be mental balanced.
There's a lot of points to consider...
Are two types of focus: hyperfocus, which involves intense and sustained concentration on a single task, leading to high productivity, and scatterfocus, which involves fostering creativity and generating new ideas.
Make a list or identify every distraction. Whether from the external environment or your own (such as cell phone notifications or thoughts).
Choose an ideal environment. Some people find it difficult to maintain concentration in noisy environments, with movement and the risk of causing setbacks.
Keep a cool head. It's impossible to keep your mind working like a machine; you have to take breaks to prevent mental fatigue and becoming tired in the process.
I read this book. I guess, it teaches us how to manage and organize ourselves better, schedule priority and optional tasks, how to regulate our mental factor and make better decisions.