The first thing to do is not oversell the MBA. That is an impressive accomplishment and you deserve congratulations however these days I'm sure you realize that there are probably hundreds if not thousands of MBA's looking for work. In that sense you are one of many. You need to stand out .........you need to be different from all those other MBA's looking for a job. You need to sell yourself....not your MBA.
If I may be so bold to make a further suggestion. Before you go on your next job interview put that MBA to good use and.....DO YOUR HOMEWORK!!
Learn all you can about the company that has granted you an interview. As you gather information about the company do an honest assessment of your own skills and experiences and how they might "fit" with this company. At the interview impress the heck out of them with your knowledge of the company, it's products or services and how you will be a great fit for them. Do all this and you will get a job sooner than you think. What you need to realize is there are companies out there that need you.....they just don't realize it yet. Go out and sell yourself and always remember your MBA will help you perform your job but, these days, it will not get you the job.............only you can do that.