No, there's not really much you can do. How time consuming a course is will depend a lot more on the professor than the materials. My torts class was not very time consuming because the professor went very slow, never covering more than one case per class. He spent two weeks on one 10 page case. My crim professor went very slow as well. My property professor on the other hand covered 30 pages of reading per class, three times a week. Another torts professor gave assignments that averaged between 30-40 pages 5 times a week.
If you really really want something to do, go find cases online and read them. Read a couple every day. Just to get an idea of how they are laid out, how to work through them. Ask yourself questions afterwards like whether you understand what actually happened (the facts), what the court actually decided (the holding), and why the court did it (some of the reasoning). You can only come to law school with these types of general skills. If you do any more specific work, you'll likely have to unlearn it before you understand your professor.
My advice on study schedules is to hold off. For the first two weeks, work as hard as you need to in order to get everything done. Keep a journal, diary, or timesheet of how long you are working on each class. Then after a couple weeks, generate a study schedule based on what you've learned about each class and how well you can get through the material.