Imagine you bought a new phone, but at the end of each day, every day, the operating system crashed. Would you keep using the faulty phone? Of course not. You’d take it back to the store, complain, and get a new one.

And yet, many people run their entire lives on a faulty operating system. It’s called the to-do list. Have you ever met someone who runs their day using a to-do list and actually finishes everything they said they’d do? Me neither.

To-do list devotees keep a running register of all the things they promise to get done, but at the end of the day, they’re surprised to find the list of uncompleted tasks has gotten longer, not shorter. The next day, they repeat the Sisyphean practice. Their days, months, and sometimes entire careers are spent in a harried blur of never getting enough done, even though they’re using a technique that’s supposed to make them more productive.