Being Prolific — Is That the Secret?

Should you aim to be prolific?  To be prolific as a writer means to be highly productive, to write a lot, and (one hopes) to be published a lot.  Should that be your goal? If so, what is the key to being prolific?

The ultimate aims of writers vary, but a short list of such goals could include:

I want to be a famous writer, popular in my own time.I want my books to be remembered through the ages.I just have an inner need to tell a story.I want to maximize my financial earnings.I want to publish...