I think it's ok to live a life where you don't achieve something grandiose. Just enjoy what you can, and help others without it being a detriment to yourself.

Wait, there's something else?

I think we should try to make things better for the next generation. That's the goal, build up civilization some. But if you didn't cause destruction or damage, that's not bad.

So you mean almost all of us here?

I prefer optimistic nihilism, such as John keats' epitaph "Here lies one whose name was writ in water". ashes to ashes dust to dust, the wheel in the sky keeps on turning, same as it ever was etc.