I experimented with keeping negative distractions more than twenty seconds away with a lot of success. For example, I noticed that as soon as I moved unhealthy snacks to more than twenty seconds away from where I worked, I stopped impulsively snacking almost immediately.

Working ninety hours a week for any longer than one week is a recipe for burnout.

every lesson I learned fell into better management of one of three categories: my time, my attention, and my energy.