Tracking user actions can be very useful: I use it on movieterminals.com to see everything that gets typed into each console. The theory being that (one day?) I'll use that to enhance the scripts to work how people expect.
Tracking an event per page 404 or 500 can also be very helpful. If you aren't already using something more robust to track errors you could even setup alerts to watch for those events and contact you.
Goals are good, although funnels are even better.
Finally: if you can afford it I've found that Clicky offers many great advantages over google analytics. More helpful default reports, a better realtime view, etc.
Tracking user actions can be very useful: I use it on movieterminals.com to see everything that gets typed into each console. The theory being that (one day?) I'll use that to enhance the scripts to work how people expect.
Tracking an event per page 404 or 500 can also be very helpful. If you aren't already using something more robust to track errors you could even setup alerts to watch for those events and contact you.
Goals are good, although funnels are even better.
Finally: if you can afford it I've found that Clicky offers many great advantages over google analytics. More helpful default reports, a better realtime view, etc.