Order of priority. What you need to do verses what you want to do. Set specific goals and orders of importance of actions you are doing. Eliminate or postpone anything that is impeading you from achieving your goals. Eat correctly and rest when you need to. Choline, Inositol and PABA can help with memory and concentration. Carbonated beverages can impead the ammount of oxygen in your blood and and make you feel tired or make it harder to digest food correctly. Focus on how important this is to you and use that to motivate you to achieve sucess. Good Luck.