When you are rolled into the operating room at the hospital, you want to know that the surgeon is ready to concentrate on your procedure. When you board a jetliner for your next vacation destination, you want to know that the tower crew is rested and ready to direct the pilot through dense airport traffic.

Concentration is vital in some professions. Even in our everyday lives, though, we all need to concentrate—to prevent traffic accidents, to get the job finished, to remember important information. But with today's world filled with flashing images on TV, 24-hour news cycles, and fast-food restaurants on every corner, are we capable of concentrating as well as we used to?

Before we answer that question, let's take a closer look at concentration, and its sibling, attention. Attention is a global term. It is used to describe a state in which you are interested in everything going on around you. Concentration focuses that attention on a specific thing.

Attention and concentration developed in humans as defense mechanisms. Early humans had to be constantly alert or be eaten. But it's hard to keep up a high level of attention for long periods of time without getting stressed out.

Stress is good in small quantities, but too much stress leads to burnout, accidents, or illness. Think of your life today. Stress? That's your middle name, right? Hurry here, hurry there, with never enough time in the day.

So, with all this stress and a culture that thrives on short takes, can we concentrate?

One reason people have trouble concentrating may be too much screen time. When a brain is battered by so much stimulation, it's hard to concentrate on just one thing.

To help tune up your concentration skills, practice these tips:

• Cut back on the amount of television and other screen time you and your children watch.
• Get enough sleep. The CDC recommends 7 hours to 9 hours of sleep for adults, 8 hours to 10 hours for teens, 9 hours to 12 hours for school kids, and even more for preschoolers and toddlers.
• Stay away from drinks that contain stimulants. Although caffeine or nicotine can give you a quick boost, it lasts only a short time.
• Pay attention to what you eat. A high-fat meal can leave you feeling sluggish. This is not because the body needs the extra blood to help digest the food. Research has shown that you feel sleepy after eating a meal high in fat or refined sugar because these foods change the makeup of the amino acids entering the brain.
• Try to stay calm and relaxed. Take a short break of a few seconds to a minute every hour or so at work to break the tension cycle. Just taking a moment to breathe deeply and slowly can help you re-center yourself.