In 1990, two business thinkers published an idea that changed how companies think about strategy: stop trying to be good at everything. Instead, identify the two or three things you do better than almost anyone else, and build everything around those. They called those things core competencies. The same principle applies to your life and your week. You have two or three things you do naturally well, that energise you, and where you create the most value. Those are your core competencies. Everything else is a candidate for cutting, minimising, or handing to someone else. The problem is that most people spend their best hours on tasks that have nothing to do with what they are genuinely good at, and reserve scraps of energy for the work that actually matters. A Nobel Prize winner in chemistry once wrote published poetry on the side. Not because he was trying to be impressive, but because poetry was one of the small number of pursuits that lit him up. He did not spread himself across ten disciplines. He went deep on two. That focus is a large part of what made him remarkable. The question worth asking yourself is this: if you were given enough money that you never had to work again, which parts of your current life would you still want to do? The things you would keep — those are your core competencies. Build your 168 hours around them.