I first discovered the miracle called Google Calendar in my sophomore year. I wish I had it in freshman year.
Every Monday I would print out the agenda for the next week and carry it around in a binder, making notes, writing down homework, and making adjustments accordingly - then going home and keying it into the computer.
This picture is not meant to scare you, yet it does anyways. It scares me even now:
I don't expect you to be insane like me and enroll in 24 credit hours, but I found that once I scheduled dinners or lunches with friends, made appointments, planned out homework time and study groups, I actually slept more than everyone else.
I had a separate calendar for all my courses. At the beginning of the semester, once I received the syllabus with a calendar, I would input all the exam, quiz, and project due dates.
Google Calendar is so easy to use!!
I also input club/society meetings, study/homework times on the weekends, and even social outings.
I don't think this is considered OCD, but it sure was close to it. If you can manage your time, you can show your college that you, like I once did, own it.