I'm a fairly ascetic person. And I do most of my writing at night. You don't get distracted, your brain goes into what you are writing about, into the world you're writing about, rather than into the world you're in.
My mom would be leaving the house and she'd say, 'Don't you pull out all of the old dresses in the attic and put on a show again!' And the door would close, and that's exactly what I'd do. The show was calling me!
The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair.