1. "

    Deep work, which requires complete focus and pushes us to our intellectual and creative limits, is vital to many of our jobs and also our happiness. After engaging in deep work, you feel satisfied and proud. But it’s really hard to stay in that state of intense concentration for more than three or four hours a day.

    So if deep work is the most important part of your job, but you’ve also committed to yourself to working eight-hour days, you’re basically doomed to spend the other four to five hours on busywork and clicking around the internet.

    "