And I agree with kprc1 said except this part. You need to be smart about your study habits. Restrict alcohol consumption, spend the majority of your time studying, but take breaks! Get plenty of rest and exercise while in training and eat as healthy as you can. Rest, exercise and good nutrition will help your brain function optimally. Having said that, training is not time for partying and living it up or dealing with other stressors in your life, if possible. Try to get as much of "life" taken care of to where you can let it run on autopilot for a couple of months. Tell your loved ones not to expect you home for 2-3 months, but that you will stay in touch as much as possible. Then focus your attention on training and living a healthy lifestyle and that is about it.