Ray Bradbury's advice

In his lifetime, Ray Bradbury wrote over 400 short stories and 11 novels — including Fahrenheit 451, his most famous work. Ray wasn’t always a good writer. I took him ten years to write his first good story.

To be successfull Ray tells us to make work our partner:

WORK. It is, above all, the word about which your career will revolve for a lifetime. Beginning now you should become not its slave, which is too mean a term, but its partner. Once you are really a co-sharer of existence with your work, that word will lose its repellent aspects. It won’t be easy, of course. You might get a hundred rejection slips. 

But your failures are not your failures:
So we should not look down on work nor look down on the forty-five out of fifty-two stories written in our first year as failures. To fail is to give up. But you are in the midst of a moving process. Nothing fails then. All goes on. Work is done. 

If good, you learn from it. If bad, you learn even more. Work done and behind you is a lesson to be studied. There is no failure unless one stops. Not to work is to cease, tighten up, become nervous and therefore destructive of the creative process.

Do. Learn. Grow.