Time management is a subset of a more critical skill: energy management. Instead of just scheduling your day, actively invest your energy in people and activities that replenish it, while divesting from those that drain it. This shift in focus is a more fundamental driver of productivity and well-being.

All concerns fall into three categories: your business (your control), their business (their control), and reality's business (uncontrollable forces). Stress and loneliness arise from mentally operating outside of your own business.

High performers need routines, but over-reliance creates fragility. The Stoic concept of "preferred indifference" resolves this paradox. First, know you can thrive in any situation. Then, you can have preferences that optimize performance. This allows you to want something without needing it to function.

When frustrated by something you can't control (traffic, a colleague's behavior), the phrase 'let them' serves as a practical tool. It's not about condoning behavior but about accepting reality to conserve your mental energy. This allows you to focus on what you *can* control: your own response.

We procrastinate on important tasks because we implicitly assume we have unlimited time. The practice of "Memento Mori"—remembering that life is short—creates the urgency needed to act. As Marcus Aurelius wrote, "You could leave life right now. Let that determine what you do and say and think."

Instead of ignoring or obsessing over a source of anxiety, address it only when necessary. Live the rest of your life as if the problem doesn't exist. This "strategic compartmentalizing" preserves mental energy for daily life, preventing the stress of uncertainty from becoming all-consuming.

Frame daily activities as either contributing to 'aliveness' (connection, movement, focus) or 'numbness' (doomscrolling, binge-watching). This simple heuristic helps you consciously choose actions that energize you and build a more fulfilling life, rather than those that numb and distract you.

Marcus Aurelius's "view from above" is a concrete technique, similar to cognitive behavioral therapy, for managing anxiety. It involves visualizing yourself zooming out from your immediate situation to a cosmic scale. This mental drill provides perspective, shrinking overwhelming problems to a more manageable size.

This counterintuitive mindset is not about self-blame but about reclaiming control. By accepting that everything in your life is your responsibility, you empower yourself to change your circumstances, rather than waiting for external factors to improve. This agency is the foundation of happiness.