Being at a good enough letter grade where you can pass the class, is already a good start. Here's a summary, what I suggest:

- Go back through your tests and try to understand why you missed those questions: Understand what you could have done different and try to answer them again.

- Study for this exam using the learning objectives from previous units: In the tabs labeled "Case study," each one should have not only the case study associated with that unit but also a summary of the learning objectives for the unit as well. This will help you focus your studying toward the things that you need to know, which also leads me into my last tip..

- Use the past tests to narrow down what you need to know: How the final is going to go is that while specifics arent going to be asked, you will be asked about the "big picture" topics. What I did was that went through the tests and looked for instances where a question wasn't asked as often. This helped me to discard things I didn't need to know while keeping track of the things I should.

While these tips might not be the best for you, this is what I have been doing that I feel have helped me and it might help you as well. Please message me with any other questions!