The same what I am doing now - I would be living :)
Actually I don't have any problems you have mentioned but it doesn't mean I have nothing to do.
The fact I live a sort of comfortable life means that I want to create the same opportunities for my family. The fact I'm healthy now means that I want to stay that way so I live an active life.
There are also so many things I want to learn, so many skills I want to acquire, so many places I haven't visited yet and so many things I've never tried. It's enough for more than one life :)