Exception Trigger components are just what you need.
Basically you'll have your own path in your workflow that goes: Exception Trigger - Send Email - End
With this, any time theres a general exception in your flow, the Exception Trigger takes control and the flow goes from there.
There are some caveats though: first be wary of throwing exceptions in your exception handling path (much like coding)... in other words, make sure your Send Email comp is tested and failsafe.
Usually these trigger components are combined with GoTo components to jump back into the workflow at predetrmined points.