--- title: The Simplicity Audit created: 2024-11-18T09:16:50 modified: 2026-02-16T04:03:19 --- # 4 key environments of life 1. Physical Environment > **The 1-In-1-Out Rule**: to add one “thing”, you have to remove one “thing.” 2. Digital Environment 3. Mental Environment 4. Social Environment --- For each item in each environment, ask two questions: * “_Is this absolutely necessary?_” * “_Is this energy creating?_”