This wouldn't apply to everyone's circumstances, but I found it helpful to go for a walk away from the office in the middle of every day, weather permitting. (I

This wouldn't apply to everyone's circumstances, but I found it helpful to go for a walk away from the office in the middle of every day, weather permitting. (I worked in a city with interesting scenery; I'd eat lunch in 15 minutes, then wander around exploring for 45 minutes.) It was refreshing, and gave me perspective that there was a world outside of the office.