Logging best practices in .NET applications are essential for ensuring that error logs contain the correct information when needed. Utilizing third-party logging libraries such as NLog, Log4Net, and Serilog can simplify error logging by offering robust APIs and preventing developers from reinventing the wheel. Log levels, including DEBUG, INFO, WARN, ERROR, and FATAL, help categorize the severity of messages, with higher severity logs like WARN and ERROR being prioritized in production environments to enhance performance and storage efficiency. Contextual logging, which includes relevant application data like request details and user information, aids in diagnosing issues, while structured logging facilitates the management and analysis of growing log data. Filtering logs and avoiding sensitive information in production further refine error logging practices. Tools like Rollbar can automate the tracking and management of .NET errors, providing developers with real-time insights to streamline the error resolution process.