“Drinking enough water is also important for concentration,” said Kimszai.
According to research done by the University of East London and the University of Westminster in the U.K., when you don't get enough water your response time slows down when doing tasks. Kimszai recommends drinking 64 ounces of water a day.
Take a large bottle of water with you to work every day, and don’t forget that you can get also water from foods like cucumbers, apples, celery, soups, cauliflower, spinach, oranges, zucchini, broccoli and yogurt.