Ahhh, zero days. Especially solo zero days -- nothing specific to do, no one to meet for lunch, no schedule to keep.
First things first: laundry. I did a prewash of all of my clothes in the shower, to get the majority of the literal dirt out of them, and then headed next door to the laundromat. 45 minutes later, my clothes were spotless! It was amazing -- I feel like a real member of society (except for looking decidedly unshorn, of course).
I then walked to the highly-regarded local sandwich joint, Sammich. Their pastrami did not disappoint!