First thing first, you need your sleep. If you don't sleep the brain stops working properly and everything becomes increasingly difficult. Short term (crammin

First thing first, you need your sleep. If you don't sleep the brain stops working properly and everything becomes increasingly difficult. Short term (cramming before an exam) -- OK. Long term, don't do it, it's not worth it. Better to look at productivity strategies which someone else will be able to help you with. You're right about the exercise as well, getting oxygen into the brain, and generally being fit, will help the brain work. But please, sleep. If needs be do it in 2 or 3 shifts over a day/night, but one way or another you should have at least 7 hours in every 24.