Vary your diet

The foods you eat can have an impact on cognitive functions including memory and concentration. Avoid processed foods, excessive amounts of sugar, and excessively greasy or fatty foods to improve focus. Try consuming more of the following foods instead: fatty fish (think salmon and trout), eggs (white and yolk both), blueberries, spinach,...

The ability to concentrate might benefit from keeping hydrated. Concentration and memory can both suffer from even mild dehydration. By sharpening your concentration first thing in the morning, breakfast can help. Aim for a meal that is high in protein and fiber and low in added sugars. Healthy breakfast options include whole-grain bread with eggs, a plain yogurt with fruit, and oatmeal.