Hello, Proper hydration is one of the way so plenty of liquids like nimupani mausambi juice coconut water to be taken in very good quantity, it helps a lot. To take lot of hard core candy to chew during study time which activate your brain so you can study with feel capacity. GLUCOSE FOUR TSF three four times also keep u fresh. These r few ways.at night black coffee with elaichy FLAVORS two times is also helpful.ok.