These authors claimed that was sufficient. According to their method, even as they did all the various things that are their life, their brain was working on whatever writing project they were trying to complete. That way, when they did get a few minutes to write, actually putting words on paper (or into the computer) was much easier.
Well, I do that, as much as I can. If I can't fall asleep right away, it's probably because I'm trying to figure out the next scene, or a character's motivation. I can't tell you how many times supper has gotten just a little over-done because I was having an internal debate over if some story should go in this direction or that direction. A permanent state of distraction seems to be a normal piece of many an author's life.
But for me, it's not enough. Occasionally, I can get a couple hundred words written in the fifteen minutes I've got that day, but most days, I'm lucky to get a couple lines written, if that's all the time I've got. I think of shedding some of my other commitments, but which ones? I took up every one of them for a reason, and that reason is still there. Do I try to think harder about my stories? Let's face it, driving distracted is not a good idea.
I hate procrastinating my writing. I've taken vacations where all I did – other than a daily dip in the pool and occasionally finding something to eat – was write. It never lasts long enough. Eventually, I have to return to regular life, and trying to squeeze as many words out of me in fifteen or twenty minutes as I can. But at least I can squeeze those few minutes out of each day – most days.
Use your time as wisely as you can. But remember that 'day-dreaming' about your stories is a part of the process. So the next time your day-dreams are interrupted by someone asking, "Whatcha doin'?" or "Penny for your thoughts?", feel free to grin and tell them, "Just working on my best-seller." See ya next week. Trudy