Salvador Mercer said:
Brandon Sanderson, the fantasy genre writer who writes like 300 or 400k word novels actually blogged in an interview that he doesn't actually write very quickly but that he is CONSISTENT.
Consistency has been key for me. I write about 1000 words per hour, sometimes more, usually not less. When I'm in writing mode, I stick my hiney in my work space and write, period. I juggle projects, so if something isn't working on one WIP, I clear my head and sit back down with another project. Some days, I have to skip writing so I can work on editing/revision or getting a story published. On average, though, I write 5-6 days per week and spend around eight to ten hours per day on writing related activities.
One thing that helps me tremendously is setting concrete goals and breaking them down into working goals. This year, my concrete goal is to complete the first drafts of six novels, four under another pen name (about 80K words each) and two under this one (maybe 100K words each). I write by scenes rather than word count. (Stopping in the middle of a scene throws my whole process off.) My scenes average about 2K words each, so I set the goal of two scenes per writing day (about 4K words) and extrapolated to set monthly and quarterly goals. Even writing five days per week, that's about a million words written in a year, way more than I need to meet my concrete goals. Once I complete the projects I have scheduled, I'll work on others I have lined up. I fully expect to complete eight full-length novels (publication dates spread over 2015 and 2016) and several shorter works this year.
I'm a plotter-pantser hybrid. I work from plot points that are fairly loose, like "Main Character finds out xyz," and work out the exact details as I write or sometimes change them completely, if I have a better idea for the story's direction. 2K to 10K really helped me, simply because it forced me to think about the whens, wheres, and hows of my writing process. My best time to write is at the end of my day. Most of my writing gets done between 9 p.m. and 5 a.m., though I usually only write for two hours before midnight and for two to four hours after. I sleep during the late mornings and early afternoons, and work on writing related things until supper (blog posts, e-mails, marketing, etc.). I do a lot of brainstorming between waking and getting up, during that quiet time when everybody thinks I'm still asleep. Some of my best ideas hit me then.
I also edit a little as I write. (I read and lightly edit the previous night's work right before I sit down to start writing each night, usually to clarify details and refresh my memory on where the story is.) The more I write, the cleaner my first drafts are. I will never be able to hit the word counts of, for example, YodaRead (awesome work production, by the way), but I'm very satisfied with my writing progress.