I’m always within the first five people in the office, so it’s often that there’ll be no-one over my side when I get in.
Along one of the walls are a series of paintings, all hung next to each other. Every few days, if there’s no-one else around, I change the order of the pictures.
I haven’t told anyone that I do this, and while someone did once say “I thought that picture was over there”, they quickly dismissed this as their own mistake.
I plan on doing this indefinitely.