At the grad school that I went to, senior grad students were offered a chance to move out of the lab and into a private "dissertating office" as they became available. With a couch I could nap on, an incredible window view to gaze out from, and a door I could shut for focus work, it was amazingly productive for finishing my dissertation. Those few months were the only time that I've ever had a private office and to this day I still rather miss it.

(And most of my favorite papers came about from ideas that I'd had while on vacation.)