When it comes to analytics, I want to keep track of everything. Literally everything. From our website uptime, to our server response time. From our website unique visits, post reads, to where users click. From our apps users number, to the daily sessions and the number of bugs that may occur in a release.
There are thousands of tools (most of them are open source or free) to do this, so there are no excuses.
This is how you can be 100% aware of what is happening, this is how you can be sure that you will handle any situation as soon as possible to prevent a catastrophic failure.
One of my favorite quote is this:
If you can’t measure it, you can’t manage it.
(photo credit: dragonart)