Here's how you live an unexamined life: go looking for yourself. You want to examine something? Examine this *gives Spanish gesture of contempt*. Anyone who examines their life with any honesty will quickly move on to equally fruitless things.
The unexamined life is not worth examining.
On another note altogether: what is wrong with having no ambition? Ambition is vastly overrated. Do I really want to sprint to my own grave with my eyes shut?