Debugging is an essential skill for Django developers as it helps identify and resolve issues in web applications efficiently. Here are the top 5 debugging techniques that every Django developer should master:

1. Utilizing Django Debug Toolbar: This powerful tool provides a detailed insight into your application's performance and SQL queries. It’s invaluable for finding bottlenecks in your code.
2. Using Print Statements: Sometimes, the simplest methods are the best. Placing print() statements in your code can help trace the flow of execution and identify where things go awry.
3. Employing Python's Built-in Debugger (pdb): By inserting import pdb; pdb.set_trace() in your code, you can pause execution and inspect variables in real-time.
4. Monitoring Logs: Regularly checking Django's log files can reveal hidden issues. Setting the logging level to DEBUG can provide detailed information about the application's performance.
5. Unit Testing: Writing unit tests can preemptively catch bugs before they become problems, ensuring your application remains robust.

Django, a powerful web framework, is not without its challenges. One common error developers encounter is the ImportError, which occurs when Python cannot locate the specified module. This can happen due to several reasons, such as incorrectly named files or directories, or failing to add the app to the INSTALLED_APPS setting in settings.py. To resolve this, ensure that your application's directory structure is correct and that all necessary modules are properly imported. Additionally, verify that your virtual environment is activated and contains all required dependencies.

Another frequent issue is the DatabaseError, which may arise from problems with database connectivity or migrations. This can be particularly puzzling for newcomers, especially when encountering messages about missing tables or fields. To fix these issues, start by checking your database settings in settings.py. Run the command python manage.py makemigrations followed by python manage.py migrate to create the necessary database schema. If problems persist, inspect your database server status and connection parameters to ensure everything is functioning as intended.

When developing a Django application, encountering crashes can be both frustrating and confusing. Common pitfalls can arise from various areas of your code, configurations, or server settings. One primary reason for these crashes is unhandled exceptions. If your application encounters an error that isn’t explicitly caught, it can lead to a complete failure of your app, resulting in a crash. To mitigate this risk, ensure that you thoroughly handle exceptions using try and except blocks wherever necessary.

Another frequent cause of crashes in a Django application can be related to database connections. If your application exceeds the maximum number of connections allowed by the database or fails to close connections properly, it may lead to resource exhaustion, causing it to crash. To prevent these issues, monitor your database connection settings and consider implementing a connection pool. Additionally, review your hosted environment's resource allocations, as inadequate memory or processing power can also significantly affect your application's stability.