Angular is a powerful framework that enables developers to create dynamic and efficient web applications. At the heart of Angular's architecture are components and services. Understanding how to effectively utilize these building blocks is essential for mastering the framework. Components act as the view layer of your application, encapsulating HTML templates, styles, and logic. They help to define the application's user interface and improve its reusability. Meanwhile, services serve as a way to encapsulate business logic, allowing for easier data handling, state management, and communication with external APIs. By mastering these elements, you lay a strong foundation for building maintainable and scalable applications.

To successfully implement components and services, developers can follow these best practices:

1. Keep components small and focused: Each component should serve a single purpose and should be easily testable.
2. Utilize input and output properties: This promotes better data handling between components, making your application more flexible.
3. Employ dependency injection: Use Angular’s built-in dependency injection to manage service instances, enhancing modularity and ease of testing.
4. Leverage Angular's lifecycle hooks: Understanding component lifecycle can optimize the performance of your app.

Angular development can be a rewarding experience, but developers often fall into common traps that can hinder their progress and application performance. One significant mistake is neglecting proper module organization. Failing to modularize components effectively can lead to a tangled codebase that becomes difficult to manage and scale. To avoid this, developers should follow best practices and utilize Angular's modular architecture.

Another frequent error is overusing services and not understanding their lifecycle. When services are utilized improperly, it can lead to memory leaks or unintended behavior in applications. To mitigate this, ensure that services are injected only when necessary, and consider using Angular's built-in features for managing service instances efficiently. By being mindful of these common pitfalls, developers can enhance the quality and efficiency of their Angular applications.

Optimizing your Angular app for performance is crucial for providing a seamless user experience. Start by making use of Angular's built-in tools such as the Angular CLI to create production builds, which automatically apply optimizations like tree-shaking and minification of your application code. Additionally, leverage the OnPush change detection strategy to minimize unnecessary checks and updates, ensuring that your application remains responsive. You can also utilize lazy loading to load feature modules only when they are required, which reduces the initial loading time and enhances overall performance.

Another effective way to optimize your Angular app is by keeping your component's size manageable. Break down large components into smaller, reusable ones and employ the trackBy option with ngFor to improve rendering performance of lists. Furthermore, consider employing Angular's service workers to enable caching and service-related optimization strategies, which can significantly reduce server requests. Finally, regularly analyze your app's performance using tools like Angular's built-in performance profiler to identify bottlenecks and make necessary adjustments, ensuring that your application is always running at its best.