One's lifework, I have learned, grows with the working and the living. Do it as if your life depended on it, and first thing you know, you'll have made a life out of it. A good life, too.
For me, writing is the only thing that passes the three tests of metier: (1) when I'm doing it, I don't feel that I should be doing something else instead; (2.) it produces a sense of accomplishment and, once in a while, pride; and (3) it's frightening.
The good old days were never that good, believe me. The good new days are today, and better days are coming tomorrow. Our greatest songs are still unsung.