I have some thoughts and one has already been hit upon.

A professor of mine strongly suggest treating school like a 40 hour a week job like you'll experience when you graduate anyway. He says start studying at 8:00 in the morning, take a lunch break, and conclude at 4:30 or 5:00 everyday. Whether you are in class or studying that time should be dedicated for that.

Obviously there are some problems in that not all of our classes are neatly scheduled in those hours, plus people work and go to school. But I think the point was routine as Bark mentioned. If you could find some dedicated times for studying where you study at those times on those days of the week.

My second thought is to ask where are you studying? I know I have a lot of distractions at home. Not just tv and stuff, buy my mind wanders a lot more when I'm here. But if I go to the library and set up in front of a computer or take my lap top and set up at a desk/table, I usually sit there and actually get work done. I don't know if you could try something like that.

One more just popped into my head. Can you find study partners for each of your classes to meet with twice a week. I've done that. It's helps tremendously. It means that I have someone who holds me accountable. So I get with him and do homework for the two classes we share. Then, I have group projects in two more classes, so they help me there. That only leaves me two classes that I have to make myself study for.

Best of luck to you.