After looking at the way things are on this earth, here's what I've decided is the best way to live: Take care of yourself, have a good time, and make the most of whatever job you have for as long as God gives you life. And that's about it. That's the human lot.
Yes, we should make the most of what God gives, both the bounty and the capacity to enjoy it, accepting what's given and delighting in the work. It's God's gift!
God deals out joy in the present, the now. It's useless to brood over how long we might live.