Back in the day, when Rhian and I were in grad school, the workshop was having a discussion about writing habits. Not as in when or how often we did it, but what we did when we were doing it. You know, you sit there for three hours--if you were typing the whole time, you'd do about thirty pages, and none of us ever manage that. No, you do other stuff--pick your nose, scratch your ass, read the news, whatever. Then you impulsively type, like, three sentences, and then you go back to picking your nose for half an hour, then you erase them all. And so on.
Anyway, back in workshop, one of our esteemed peers announced that masturbating was a regular part of the writing regimen. Good lord! We didn't want to know that!! Well...actually we did, and I personally am still glad to know it; and God forbid should I ever forget all my other memories of this person, that one will always remain.
My privates shall remain private here, but I will name some of the things I do while writing that aren't writing. Eating is a big one. On a big writing day, I always eat a peanut butter and jelly sandwich right there at the computer. (Here, you can watch me do it in this video.) When I was writing my (still, and possibly permanently, unpublished) crime novel, I played a hell of a lot of Mr. Do!, using MAME on my laptop. I post incessantly on a messageboard for recording geeks, and often take ten-minute breaks to play a little guitar. The guitar playing is actually mentally useful anyway, as it draws on the mathematical part of the brain, leaving the language bit alone to recharge.
So what do you while away the empty minutes with? If it's masturbation, I don't think we want to know, although if any of you manages to have actual sex while writing, we could definitely put aside our squeamishness to admire your mad skills.