Auch eine nette Idee Google Analytics zu nutzen:
To sum up, track error messages and 404 pages as events in Google Analytics, and analyze the top error patterns. Prioritize the causes of errors, and continue to improve your forms and 404 pages to avoid errors altogether. Lastly, test changes in the content and design of error messages to see whether they decrease repeated errors. Improving your forms, 404 pages and error messages will improve your website’s overall user experience.