Being very prolific can help you promote yourself. Write as much as you can and try to get published everywhere you can... and in saying this I mean not just writing in your main area of interest. Try sending out articles, essays, short stories and editorials to newspapers, magazines and journals that publish any subject that you're interested in writing about. Even if you ultimately are mainly interested in writing in a specific genre or format, getting published in other places will help you establish your name and make connections. Any writing opportunity should be considered a good writing opportunity... I wouldn't advise "saving your talent" for only one thing. Bottom line: get published wherever you can. The more you get out there, the more (and better) opportunites should follow.
How to Write Scientific Fiction: Analyzing Michael Crichton’s Sphere
In this post, Dustin Grinnell explores the tactics that author Michael Crichton used to craft realistic science fiction within one of his most popular novels, 'Sphere.'