The following snippet will make it easier to find content that is erroring:
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-XXXXXX-X']);
_gaq.push(['_setDomainName', 'xxxxxxx.com']);
<% if(title.indexOf('404') != -1 ) { %>
_gaq.push(['_trackPageview'],'/404.html/?url=' + document.location.pathname + document.location.search + '&ref=' + document.referrer]);
<% } else if ( title.indexOf('500') != -1 ) { %>
_gaq.push(['_trackPageview'],'/500.html/?url=' + document.location.pathname + document.location.search + '&ref=' + document.referrer]);
<% } else { %>
_gaq.push(['_trackPageview']);
<% } %>
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
Using this link I managed to set up email alerts for 404s
And I think that is it.