Angular is a powerful framework for building dynamic web applications, and there are several essential features that every developer should know to maximize their productivity. First on the list is the Component-Based Architecture, which allows developers to break down applications into manageable, reusable components. This modularity not only enhances maintainability but also fosters collaboration among team members. Secondly, the Two-Way Data Binding feature ensures seamless synchronization between the model and the view, making it easier to reflect changes in the UI without extra coding effort.

Another significant feature is the Dependency Injection, which simplifies the process of managing dependencies between various components in an Angular application. This leads to cleaner code and improved testability. Fourth, the Routing Module enables developers to create single-page applications with ease, allowing seamless navigation without the need to reload the entire page. Lastly, the Reactive Programming capabilities provided by RxJS facilitate the management of asynchronous data streams, making it simpler to handle events and update the UI accordingly. Understanding these essential features can significantly boost your Angular development skills.

Mastering Angular components is essential for building dynamic and maintainable web applications. Angular components are the basic building blocks of the framework, encapsulating both logic and template structure. To start mastering these components, you should first understand the lifecycle of an Angular component, which includes various stages such as creation, updating, and destruction. This lifecycle provides hooks that allow you to tap into project flow and manage resources efficiently. Additionally, it’s crucial to grasp the concepts of data binding, event handling, and property configuration as these will form the backbone of your component's interactivity and user experience.

Next, dive into the create process of Angular components by utilizing the Angular CLI for streamlined setup. Start with basic components and gradually introduce more advanced features such as input and output decorators that facilitate communication between components. To enhance your learning experience, consider implementing reusable components within your application. Creating a library of components not only boosts productivity but also encourages cleaner and more maintainable code. By following these steps, you'll be on your way to mastering Angular components and creating responsive applications that meet the needs of users.

Angular, widely regarded for its robust framework, is not without its common pitfalls that developers frequently encounter. One of the most predominant issues is the ‘ExpressionChangedAfterItHasBeenCheckedError’. This error typically arises when an expression in your template changes after Angular has already checked for changes. To resolve this, ensure that asynchronous operations are properly handled and that you utilize Angular's lifecycle hooks, such as ngAfterViewInit and ngOnInit, to manage state changes effectively.

Another frequent obstacle for Angular developers is the ‘Cannot read property of undefined’ error. This often occurs when a property of an object is being accessed before the object is fully initialized. To mitigate this issue, implement safe navigation operator (?->) in your templates. This operator helps avoid runtime errors by safely checking if a property exists before trying to access it. Additionally, using *ngIf to conditionally render parts of your templates can further ensure that Angular doesn’t attempt to access properties of objects that are not yet ready.