Write my novella, the Death of Gilgamesh, to the best of my ability. Which is interesting, as it's about the inevitability of death. I don't know how I'd feel. Perhaps liberated, knowing it would all be over soon.
Pre-Marian Roman Republic. Provided I was a citizen, of course. Or maybe Byzantine Constantiople, or the Florentine Republic. The Classical Maya interest me as well, though I couldn't bear the self-sacrifice. And maybe Imperial China, or Rome under Marcus Aurelius.