There is no good answer. You must reorganize your study methods. An hour of class requires two hours of study. If you attend all the classes and do all the homework you will have no need to ‘pull all-nighters’. College students are easily distracted. Find a private place to study. Turn off all the TV, phones and such. Get up early and put in two hours..do two hours at night before going out! Your lifetime competition is doing this. Use the weekends to write papers.