Busy people all make the same mistake: they assume they are short on time, which of course they are. But time is not their only scarce resource. They are also short on bandwidth. By bandwidth I mean basic cognitive resources — psychologists call them working memory and executive control — that we use in nearly every activity. Bandwidth is what allows us to reason, to focus, to learn new ideas, to make creative leaps and to resist our immediate impulses. We use bandwidth to be a good participant at an important meeting, to be a good boss to an employee who frustrates us and to be attentive parent or spouse.
When we schedule things, we don’t want to just show up, we want to be effective when we get there. This means we need to manage bandwidth and not just manage time… Picture yourself at dinner with a friend whose marriage is on the rocks and wants some advice. Now imagine her request comes at a time when you have a big-project deadline looming. You value her friendship so you make time for dinner, but once you’re there, you find your mind wandering back to that project… while you’ve made time for her, you didn’t make bandwidth for her.