Back in 2005, I started working at a tech startup in Chicago. It was my first full-time office job and the first time I had to figure out how to manage my energy throughout a long workday. I quickly learned that it was easier for me to focus on work in the hours before lunch, so when I found myself struggling with a not-so-hard task late in the day, I’d give myself permission to quit and pick it up again in the morning.

