The trick to regularly having books published is to have a regular routine for writing them. When I was working full time, I just fit in my writing when I could, at about the same time each day. I tried to write 45 minutes a day, usually after work. Sometimes it was less. Sometimes a lot less.
But somehow it added up, just doing it day after day after day. I wrote about a book a year that way.
Now I work full time at home. When I first quit my day job, I thought I could write eight hours a day. After all, I had worked eight hours a day, right?
Well, on second thought, maybe not. Not when you take out meetings, chatting with co-workers, checking the headlines online, and getting coffee refills. Plus, even at my job (which was writing non-fiction), I was not creative 60 minutes an hour, eight hours a day.
I’ve found that I can’t write more than five hours a day. And even that is a lot. More often it's three or four. Revising and research I can sometimes do for longer. Sometimes.
Now what I try to do is write a couple of hours in the morning and the balance in the afternoon or early evening. I usually split my day between two books, although if I’m on deadline with one, that book takes over. in the next ten days my life will become interesting when I get editorial letters from two different houses. I’m not sure which one will have a tighter deadline or require more work. I might even see if I can continue to make progress on one of the books I'm writing.
A few tricks I use
A few things that have helped my productivity: the Pomodoro Technique and Freedom.
The pomodoro technique is a way of working in concentrated bursts with short breaks in-between. Author Randy Ingermanson describes it here.
Freedom is a program that shuts you off the Internet. I use it with the Pomodoro Technique.
One more thing I’ve added to my writing routine lately is reading. I still think of reading as a “treat” but after reading that Amy Kathleen Ryan made a point of reading because it helped her be a better writer I've been telling myself it's okay to read more.
Routines lead to creativity
"I only write when I am inspired. Fortunately I am inspired at 9 o'clock every morning." - William Faulkner
"I set myself 600 words a day as a minimum output, regardless of the weather, my state of mind or if I'm sick or well." - Arthur Hailey
"All through my career I've written 1,000 words a day--even if I've got a hangover. You've got to discipline yourself if you're professional. There's no other way." - J.G. Ballard