Staying hydrated is one of the best techniques to improve the overall focus. Even slight dehydration can cause fatigue, headaches, decreased awareness, and decreased focus.
Students must bring a bottle of water into the exam if permitted; a survey of university students indicated that those who took refreshments, particularly water, performed 5% more than those who did not have refreshments.
Students must begin their day by drinking a glass of water or fruit juice. Every student must consume at least 1.5 litres of water each day. That equates to eight to ten 200ml glasses. Water is the best option, but students can alternatively drink milk, small amounts of fruit juices, and herbal teas to increase their fluid intake.
Tea and coffee are also acceptable, but they contain a lot of caffeine. Therefore, students should consume it within limits. It's better to avoid high-sugar, fizzy and energetic drinks, which will cause sudden highs and lows of energy.