The importance of end-to-end GUI tests in verifying business workflows is emphasized. Adopting a page object pattern helps to interact with HTML elements on the webpage in a way that makes tests more maintainable and reusable. Following the "Tell Don't Ask" principle allows for better understanding and easier maintenance by moving logic into the page object. The Single Responsibility Principle suggests keeping assertions, exception handling, and reporting within the test. Dealing with asynchronous behavior requires considering the end-user experience and consistently bubbling exceptions back to the test. Linting, building, publishing, and sharing page object code is crucial for good coding practices, while Sonar analysis and quality gates can help prevent traditional mistakes. Treating test code like production code promotes better development habits.