As React applications scale, structuring reusable components becomes essential for maintainability and collaboration. A good approach is to separate presentational and container components—keeping UI-focused components stateless and logic-free, while handling state and data in container components or custom hooks. A common and effective folder structure includes directories like /components/common for reusable UI elements, /features for feature-specific components, /hooks for shared logic, and /context for global state. Using useContext or custom hooks (like useGallery) allows you to manage shared state cleanly across the app. For state management, local useState works for isolated scenarios, but as complexity grows, tools like Redux or Zustand can help manage deeply nested or shared state. Following atomic design principles and keeping components small, modular, and testable greatly improves readability, reusability, and long-term scalability. The key is to follow consistent naming conventions, ensure separation of concerns, and refactor logic into hooks when needed—especially as teams and features grow.