My initial commitment was to limit my online life to checking email just three times a day: When I woke up, at lunchtime and before I went home at the end of the day. On the first day, I succeeded until midmorning, and then completely broke down. I was like a sugar addict trying to resist a cupcake while working in a bakery.

What broke my resolve that first morning was the feeling that I absolutely had to send someone an email about an urgent issue. If I just wrote it and pushed “Send,” I told myself, then I wasn’t really going online.

What I failed to take into account was that new emails would download into my inbox while I wrote my own. None of them required an immediate reply, and yet I found it impossible to resist peeking at the first new message that carried an enticing subject line. And the second. And the third.

In a matter of moments, I was back in a self-reinforcing cycle. By the next day, I had given up trying to cut back my digital life. I turned instead to the simpler task of resisting diet soda, alcohol and sugar.