Sounds like one of the trainings I coordinate for corporate clients at work. It is also important to people who freelance, or work from home, or write novels...
I have a job in real life. But as a writer who has written for the educational market and published a hand full of nonfiction books, I consider my writing a real part-time job.
It can feel very solitary. And it is hard for me to self-motivate sometimes. That's usually when I call or email my critique group, or arrange to go sit in a coffee shop next to my sister, or reach out through the internet to other writers.
It's important to be accountable to yourself, whether you're writing a newspaper article, your first novel, or a work for hire assignment. What are your writing goals? What do you want to be "when you grow up?" Are you hoping to be a full-time writer? Or are you content writing for yourself or your children?
After myself, I feel accountable to my writing group. I trust them--we consider the successes of each other as successes for ourselves. I feel accountable to my spouse and child--after all, the time I spend writing is often time I spend away from them. I'm accountable to my editor. Thinking those to whom I'm accountable sometimes helps me pull myself off the couch or away from twitter to get back to the work of writing.
Who are you accountable to? And does it help?