Writerhead vs. Real World: The Great Battle

When I write, I focus--usually to the exclusion of all else.

"No, I can't change his diaper. I'm in the middle of edits."

"No, I don't care. Tell the Publishers Clearinghouse van to drive on--I'm in the middle of a sex scene, here!"

Writerhead is Mr. Hyde--surly, with no sense of time. When I get into the project, I spend hours. During NaNoWriMo (National Novel Writing Month) I tried the whole "bits and pieces" approach. It wasn't pretty.

Even when the oversoaked diaper falls off of its own accord, someone has to slap another on that chubby bum-bum (though potty-training is moving along nicely, thanks for asking). The business clients do not serve themselves. And as for the PC van? For God's sake, pry me out of my chair with a crowbar if necessary please

When I talk to productive, prolific authors, what fascinates me most is their lifestyle. How do they structure their days so that they can get 2-6 novels polished in a year and not detach completely from friends and family? Are those they love merely more tolerant (and out of diapers?) Or do they stick to rigid writing schedules with military discipline and buckets of inner fortitude?

And you? If you write, when do you read? When do you pay bills? How do you balance real life and writerhead?