The best way to get rid of this annoying effect is to stay hydrated, eat a healthy breakfast, get some fresh air, exercise, and rest your mind. Drinking plenty of water can help flush out toxins and replenish body fluids. Eating a balanced meal can provide you with energy and nutrients to boost your brain function. Getting some physical activity can increase blood flow and oxygen to the brain and improve your mood. Resting your mind can help you relax and focus better.