Some food help your brain work better. If you want to improve your memory and school performance,your diet should include a lot of nut and green leafy vegetables,a lot of milk, seafood and liver as well as some oranges and cereal. There are also certain foods you can eat to give you brain a buzz when you need to keep awake or study, but you have to be careful! A cup of coffee may give you a mental boost, but too much coffee can make you restless and irritable