Consider yourself lucky to be at a law school that gives mid-terms because if you had only one final at the end...100% of your grade...you would have been in deep trouble.
I just had mid-terms too...
I posted about this on another thread...but think of it. You get graded on how you write, most everybody knows the black letter law. But can you spot the issues, organize your essay and write in a legal manner? You need to learn this outside of class. Getting your outline done, etc. is just the first step.
Get old exams, practice practice practice...and then go and debrief with the sample answers.
I went and took a writing class outside of law school. I did LEEWS last summer, it gave me a good basic understanding on how to structure the exam essay, BUT it does not give you writing practice. Then I took the Fleming's Exam Writing Workshop class. (It is only offered in California or Nevada) but you can get the CD course. Over one weekend, we were taught how to structure, how to issue spot, how to write exams. We did five exams in class and debriefed them in detail. In addition, there are more exams to do in the workbook that you can email in for critique.
It really helped me with my mid-term. I have not gotten my grades back, but I think that I did well. (We will see...
For finals, I am taking lots and lots of practice exams and debriefing them afterwards.
Hope this helps? I am only a 1L, part-time student, full-time "worker"...but maybe there are some 2Ls and 3Ls on this board who have taken this approach and can chime in?