Improving focus comes down to managing your brain’s environment, both internal and external. Your ability to concentrate depends on a specific region of the brain called the prefrontal cortex, which acts as your mental control center. This region relies on steady bursts of the neurotransmitter dopamine to update and maintain the information you’re actively working with. When that system is well-supported through sleep, movement, nutrition, and a distraction-free environment, focus comes more naturally. When it’s not, even simple tasks feel like wading through fog.
Put Your Phone in Another Room
This is the single easiest change with the most dramatic payoff. A study from the University of Texas at Austin tested nearly 800 people and found that simply having a smartphone on your desk reduced cognitive capacity, even when the phone was turned off and face down. Participants with their phones in another room significantly outperformed those with phones on the desk, and even slightly outperformed those who kept phones in a pocket or bag. The effect was linear: the more noticeable the phone, the worse people performed.
The reason isn’t notifications. It’s that part of your brain is constantly working to resist picking up the phone. That background effort drains the same mental resources you need for focus. People in the study felt they were giving full attention to their tasks, but their performance told a different story. If you need to concentrate, physically separating yourself from your phone is the highest-return move you can make.
Protect Your Work From Interruptions
Every time you get pulled away from a task, the recovery cost is steep. Research from UC Irvine found that it takes an average of 25 minutes and 26 seconds to return to the original task after an interruption. Simpler tasks might only cost you 8 minutes, but complex work can eat up the full 25. That means a handful of interruptions per hour can destroy an entire morning of productive time.
Close unnecessary browser tabs and silence notifications on your computer. If you work in an open office, noise-canceling headphones or a “do not disturb” signal can help. Block specific windows of time for deep work and let colleagues know you’re unavailable. The goal is to make interruptions something you choose rather than something that happens to you.
Work in Focused Sprints, Not Marathons
Your brain isn’t built to sustain intense concentration for hours at a stretch. The Pomodoro Technique, which uses 25-minute focused blocks followed by 5-minute breaks, works because it treats deep work as a sprint. You push hard for a short, defined period, then recover. Oregon State University recommends keeping blocks between 10 and 25 minutes, noting that longer blocks of 60 or 90 minutes tend to invite distraction and fatigue.
You can experiment with the exact ratio. Some people find 15-minute blocks more sustainable, especially when starting out. The key principle is the same: a short, intense period of single-tasking followed by a genuine break where you stand up, stretch, or look away from your screen. After four blocks, take a longer break of 15 to 30 minutes. This rhythm prevents the mental depletion that makes focus collapse in the afternoon.
Sleep Is Non-Negotiable
Poor sleep doesn’t just make you tired. It measurably slows the speed at which your brain processes information. A study published in Frontiers in Neuroscience found that people who were acutely sleep-deprived had their reaction times increase by nearly 84 milliseconds on cognitive tasks. That might sound small, but it reflects a meaningful slowdown in the brain’s ability to process and respond to information, the exact functions that underpin focus.
The prefrontal cortex, your brain’s focus headquarters, is particularly vulnerable to sleep loss. When it’s underperforming, you struggle with working memory, task-switching, and filtering out distractions. Most adults need 7 to 9 hours. If you’re consistently getting less than that and wondering why you can’t concentrate, sleep is almost certainly the bottleneck.
Move Your Body Before You Need to Think
Aerobic exercise triggers the release of a protein called brain-derived neurotrophic factor (BDNF), which supports the growth and maintenance of brain cells. Even a single session of vigorous exercise produces a measurable increase in BDNF levels. Over time, regular high-intensity aerobic exercise produces even larger and more sustained increases, supporting what researchers call neuroplasticity: the brain’s ability to form and strengthen connections.
You don’t need to run a marathon. A 20- to 30-minute session of brisk walking, cycling, or jogging before your workday can prime your brain for better concentration. Many people find that morning exercise creates a window of sharper thinking that lasts well into the afternoon. If a full workout isn’t possible, even a 10-minute walk between focus blocks can help reset your attention.
Eat Breakfast and Stay Hydrated
Your brain runs on glucose, and after a night of fasting, it needs fuel. A meta-analysis published in the journal Nutrients found that eating breakfast improves cognitive function in children and adolescents regardless of what type of breakfast it is. Meals with slower-digesting carbohydrates (oatmeal, whole grain bread, eggs with vegetables) release glucose gradually, which may help sustain energy over a longer period compared to sugary cereals or pastries that spike and crash your blood sugar.
Hydration matters just as much. Losing as little as 1% of your body mass in water, which can happen simply from not drinking enough throughout the morning, is enough to impair cognitive performance. The effects hit hardest in exactly the areas you need for focus: executive function and sustained attention. Losses beyond 2% make things significantly worse. For a 160-pound person, 1% is less than two pounds of water weight. Keep a water bottle at your desk and drink steadily throughout the day rather than trying to catch up later.
Set Up Your Physical Space
The temperature of your workspace has a direct effect on your ability to concentrate. Research from Hebrew SeniorLife found that attention is best maintained when room temperatures fall between 68 and 75 degrees Fahrenheit. For every 7 degrees outside that range, the likelihood of attention difficulties doubled. If your office runs hot or cold, a small fan or space heater can be a surprisingly effective focus tool.
Lighting and clutter also play a role. Natural light is ideal, but if that’s not available, a bright, cool-toned desk lamp reduces eye strain and keeps alertness higher than dim or warm overhead lighting. A clean desk with only the materials you need for your current task reduces the visual noise competing for your brain’s attention. Think of your workspace as an extension of your mental state: the less it pulls at your awareness, the more focus you have available for your work.
Background Noise Depends on Your Brain
Pink noise and white noise are popular focus aids, but the evidence is more nuanced than most people realize. A review from the British Psychological Society found that white and pink noise improved attention and executive function by about 8 to 10% in individuals with ADHD. However, the same noise actually impaired task performance in people without ADHD or attention difficulties.
If you have ADHD or find that you focus better with steady background sound, pink or brown noise (which emphasizes lower frequencies and sounds like a deep rumble or waterfall) is worth trying. If you don’t have attention difficulties, silence or very low-level ambient sound may serve you better. The key is to experiment honestly rather than assuming what works for others will work for you. Try a few days with background noise and a few without, and pay attention to how much you actually accomplish rather than how focused you feel.