There’s a way to build a model for your life and the other demands on you. It doesn’t have to be 100 hours a week. It might not even be 40 hours a week. Whatever sustainable model you come up with, prioritize fiercely and communicate expectations accordingly. I’ve worked this way for three decades through different phases of my life. The hours have changed, but the basic model and principles remain the same: Define the time, prioritize the work, and communicate those two effectively.