Many coursework Masters are modular, in that you can do a number of subjects and get a Grad Cert, add a few more and get a Grad Dip or do the lot and get a Masters.
This is something that's worth bearing in mind when you choose an institution, a course and subjects, because if you run out of puff and/or time before doing the full Masters you still have something to show for the work you've completed.
Have you done any tertiary study before? If not (or if it was back in the days of card catalogues, Student Protests and lecturers smoking pipes in class) it's well worth taking whatever First Year elective on tertiary writing the uni has on on offer, to brush up on your essay skills, the intitution's referencing protocols and the joys of writing to specific marking criteria (as opposed to the pipe smoking days where your mark depended on whether Professor X assessed your availablilty for post-lecture 'discussions' 
). It can boost your marks by a grade or more without having to put out, which is a good thing. 
Almost all unis have these sort of courses available because the current year 12s can generally either write whole sentences or add up but not both at the same time 
.
A little hypocritical don't you think..?