Certain settings just don't work for studying. If your study location is full of distractions or friends who only serve as a reminder that your social life is more exciting than final exam preparation, choose a different place. Ideally, you should choose a place that remains quiet and allows you to study in isolation, if desired. Wear headphones whether you listen to music or not so others are less apt to talk to you. Wear layers so unexpected changes in temperature won't throw off your focus.
Plan out a precise, detailed study schedule and adhere to it as if it were written in stone. Treat the schedule like a class schedule; if you miss it, the academic consequences are dire. Organize your study subjects based on the nearest exam. For instance, don't prioritize studying history when your math exam is scheduled to take place sooner. Try to arrange study sessions in a way that allows you to move from concept to concept rather than focusing hours on one specifically. This approach will burn you out quickly. Instead, revisit the more difficult concepts later.
There's a reason your professor had you spend all that time taking notes over the course of the semester, assuming you were in attendance regularly to write them down. Most likely, if the instructor felt something was important enough to lecture on, he will feel it's important enough to test you on it as well. Unless told otherwise, there are few more useful study resources available to you than the very words your teacher spoke to you in class.
When the semester draws to an end and your calendar is full of final exam dates, your first reaction is to cram and spend every free minute poring over your notes and books. While you definitely want to devote an ample amount of your time to study, don't forget how much stress you are building up in the process. The psychological demands of preparing for a final exam are overwhelming at times. Schedule some time for regular exercise in your day, even if it's just a brisk walk. This will help you stay focused and energized for future study sessions.