Here is an excerpt from an article written by Peter Bregman for the Harvard Business Review blog. To read the complete article, check out the wealth of free resources, and sign up for a subscription to HBR email alerts, please click here.

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I was late for my meeting with the CEO of a technology company and I was emailing him from my iPhone as I walked onto the elevator in his company’s office building. I stayed focused on the screen as I rode to the sixth floor. I was still typing with my thumbs when the elevator doors opened and I walked out without looking up. Then I heard a voice behind me, “Wrong floor.” I looked back at the man who was holding the door open for me to get back in; it was the CEO, a big smile on his face. He had been in the elevator with me the whole time. “Busted,” he said.

The world is moving fast and it’s only getting faster. So much technology. So much information. So much to understand, to think about, to react to. A friend of mine recently took a new job as the head of learning and development at a mid-sized investment bank. When she came to work her first day on the job she turned on her computer, logged in with the password they had given her, and found 385 messages already waiting for her.

So we try to speed up to match the pace of the action around us. We stay up until 3 am trying to answer all our emails. We twitter, we facebook, and we link-in. We scan news websites wanting to make sure we stay up to date on the latest updates. And we salivate each time we hear the beep or vibration of a new text message.

But that’s a mistake. The speed with which information hurtles towards us is unavoidable (and it’s getting worse). But trying to catch it all is counterproductive. The faster the waves come, the more deliberately we need to navigate. Otherwise we’ll get tossed around like so many particles of sand, scattered to oblivion. Never before has it been so important to be grounded and intentional and to know what’s important.

Never before has it been so important to say “No.” No, I’m not going to read that article. No, I’m not going to read that email. No, I’m not going to take that phone call. No, I’m not going to sit through that meeting.

It’s hard to do because maybe, just maybe, that next piece of information will be the key to our success. But our success actually hinges on the opposite: on our willingness to risk missing some information. Because trying to focus on it all is a risk in itself. We’ll exhaust ourselves. We’ll get confused, nervous, and irritable. And we’ll miss the CEO standing next to us in the elevator.

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Peter next explains what the two lists are and why they should be reviewed each morning. To read the complete article, please click here.

Peter Bregman is a strategic advisor to CEOs and their leadership teams. His latest book is 18 Minutes: Find Your Focus, Master Distraction, and Get the Right Things Done. To receive an email when he posts, click here.