Writing Life After Novels: What do you do next?

I’ve recently finished (for now anyway!) my novel about an usual exhibit in a 1980s town The Exhibit of Held Breaths and while I’ve got an extremely rough draft of another novel waiting not-so-patiently in the wings and a flash fiction novella that thinks I’m never coming back, I’m unsure what to get cracking on next. The sensible option after the all encompassing nature of the novel would be possibly to finish some short fiction (abandoned inchoate orphans) but the larger works seem shinier. We’ve used the marathon analogy before for novel writing but some people train and train and then do one marathon after another. Others never go back.

What I want to know, for regular and more established writers, what do you do? Does it depend? Do you usually have a week or two off altogether, do you write short pieces, move to non-fic or do you get up the next morning and dive right in to the next novel? What writing comes straight after you’ve finished your novel?