When I'm writing a novel or doing other serious writing work, I do it on a schedule that dictates writing either 2,000 words a day or writing until noon. After I hit whichever mark comes first, then I can give my attention to everything else I have to do.
Ultimately, the first, best step in getting your work noticed is to write good work. If people don't engage in your writing, no amount of serialization or free downloads is going to matter. You have to write something worth reading, and often it takes time to get at that level.