Create detailed log files automatically every time a user on your site gets a 500 Server Error, and allow the site visitor to see a friendly customizable screen that indicates an error has occurred. The user will not see the full error, but the log files that you have access to via FTP will have a full stack with everything you need to know about what the user was doing at the time and what the error was and who the user was. You can also dump the stack from anywhere within your own ASP code.