9 weekday habits to keep your mind sharp

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Your brain is about 75% water, so proper hydration is essential for maintaining focus and memory. In fact, a study in the Journal of the American College of Nutrition found that being dehydrated by just 2% impairs attention — so drinking water supports focus throughout the morning.

For breakfast, adding foods rich in antioxidants — such as berries and pomegranate — may support brain health. A meta-analysis in the Scientific Society for Vegetarian Nutrition suggests that consuming antioxidant compounds can improve cognitive function. Mix them into high-protein, low-fat plain Greek yogurt to stay comfortably full until it’s time for a midmorning snack. 

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Morning exercise increases blood flow to the brain and can help regulate neurotransmitters such as dopamine and norepinephrine, which drive attention and motivation. What’s more, a study published by the Baker Heart and Diabetes Institute shows that a session of moderately intense morning exercise improved cognitive functions — such as working memory and executive function — throughout the day, especially when combined with short walking breaks later on.

You don’t need a grueling gym session to reap the benefits. A brisk 20-minute walk outside, a quick bike ride, 20 minutes of power yoga, or a simple at-home bodyweight circuit may be enough to activate these cognitive benefits.

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Practicing mindfulness helps train your brain to better manage distractions and regulate your attention. A study in the journal Frontiers in Psychology found that even brief mindfulness exercises can reduce mind-wandering and improve performance on cognitive tasks.

To do this, find a quiet spot, set a five-minute timer, close your eyes, consider putting on a yoga nidra or meditation script, and focus solely on the sensation of your breath. 

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That afternoon slump might have less to do with your workload and more to do with your blood sugar level. Sugary snacks cause a rapid spike and then a crash in glucose levels, which can tank energy and focus.

Instead of reaching for a sweet treat, try some blueberries with a handful of walnuts (which are rich in omega-3s and polyphenols) or an apple with almond butter to help sustain energy.

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Maintaining energy isn't just about food — engaging your brain strategically also keeps focus sharp. Instead of scrolling or catching up on stressful news during breaks, try switching to a different kind of mental task. 

Short, novel tasks may stimulate different neural pathways and promote neuroplasticity — your brain's ability to adapt and learn. Research shows that regularly engaging with new puzzles or cognitive challenges may improve working memory and processing speed.

Consider keeping a book of crossword puzzles on your desk or using a brain-training app for 10 minutes during break times.

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Positive social interaction is a powerful antidote to all types of stress. Taking a few moments to connect with someone on a personal level can help buffer the effects of the stress hormone cortisol. Why? Social connection may help regulate the body's stress responses, freeing up cognitive resources that would otherwise be spent managing anxiety.

Instead of hitting “like” on a stranger's post, walk over to a colleague's desk for a quick chat, or take 5 minutes to call a friend.

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Eight straight hours of intense focus isn’t a realistic expectation. Pushing through mental fatigue might feel like the productive thing to do, but it often leads to diminished returns and more mistakes. A study in Sage suggests that short, voluntary breaks throughout the day can reduce fatigue and improve concentration.

You might try the 20-20-20 rule to reduce digital eye strain: Every 20 minutes, look at something 20 feet away for 20 seconds. 

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Multitasking is a myth. What feels like doing several things at once is actually your brain rapidly switching between tasks — a process known as context-switching.

Studies suggest context-switching is highly inefficient, costing up to 40% of your productive time at work, as your brain constantly disengages and re-engages with different tasks. Dedicating your full attention to a single task at a time (external interruptions aside) may be a better way to get everything done right.

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Research from Harvard suggests that deciding in advance when and where you'll take action could dramatically increase your chances of following through.

Before you log off at night, take five minutes to write down your top three priorities for tomorrow. This simple habit may help you gain a sense of control and clarity.