there are a lot of guides out there on the internet that gives suggestions and schedule that might help you focus really well. One of the few suggestions I could give is to get proper sleep always, pulling all nighters do very little help because you are just stressing your brain and nothing will go in. Second, make sure to give yourself breaks after maximum 2 hours of studying. Avoid the bed and the internet, they will merely discourage you to leave your location and study again. Go out for a walk or watch your favourite short program on tv.Third,make sure you know what to study. Look for your teachers, get them to give you the list of the syllabus if you don't have or lost it.Break down the syllabus in smaller ones if it is too much. Lastly, at the end of your schedule make sure there is some time for yourself to do whatever you want before you go to sleep. I guess that is all I have, hope it helps and good luck!