One thing I've heard that can be extremely helpful is taking practice exams from the specific professor and having that professor grade them. I think this helps a lot with the professor-specific grading. Each one is looking for different things, but that's nothing new. That's basically an essential skill of college.
If I asked my professors to grade my practice tests, I would get smacked in the face. And furthermore, I would deserve it. They're busy people. It sounds great for students, but I don't see it happening.
Oh DASHRASHI! Who needs a professor? All I really need to do is have you grade my practice tests.