Do a search for Google syllabi for, say, Contracts. They will be from various schools. Download a number of them. Then, compare the cases listed in each and you'll get an idea of what the seminal cases are. Go read those cases. Don't worry if things don't make sense. You might stumble through it the first few times but be patient and perhaps look up some key terms and phrases that help you understand what the case is about. It's painstaking but you'll have to do it eventually so you might as well do it now. Preferably, go check out some books from a local law school and read the cases in the casebook, as there are some notes after the cases that can help.
I happened to come across this post and thought it was a great idea. I went on my school's website and found the syllabi for all of the classes. Thanks