Focusing on people who have a lot of information to deal with, create things or make decisions, having a system like a second brain can help save time and stress, ultimately leading to a greater sense of peace of mind.
The goal is to explore more than you exploit in a career or in life. First, you go narrow and deep on a few things that have the highest points of leverage and then you continue to move through there.
Choosing high leverage activities often leads to rough finishes because polishing things to perfection is a low leverage activity. In today's society, it is essential to prioritize execution over planning and pontificating.