Personally, I use Loggr (http://loggr.net http://loggr.net) for tracking errors and events. You can tag your events however you want so it is really easy to tra

Personally, I use Loggr (http://loggr.net http://loggr.net) for tracking errors and events. You can tag your events however you want so it is really easy to track user sessions and so on.