First off at the beginning of each semester I grab my huge calendar, markers, and my syllabi. I then plot out when all the tests will be, so I know what to expect for certain weeks. Tests in blue, reports in orange, etc.
Secondly, I carry around a planner which I write my assignments for the day. Included with the assignment I write the due date and a rough guess how how long it will take. When I get home I then use my dry erase board to copy my assignments for that day/week. I then prioritize them based on length and importance. (Test > quiz > homework) Taking all this into consideration I make a study plan for the day. Included are my goals for each part and how long I guess it will take. (Complete the assignment, understand X for test, etc.) Finally, I get to work.
My last bit of advise, get to know your professor! They can be very nice and are usually more than willing to help you. Also, if a prof knows you and sees how much you work they might help you out at the end of the semester. ie my Anatomy 1 class, my grade was an 88, but because I basically lived in her office I received an A in the class.
I hope this helps! Good Luck to you! If you need more ideas send me a PM
-Maiella