How do I come up with a dissertation topic early on in my degree? I'm currently 2 units into my MSc degree (6 units over 2 semesters left).I know this is rather early, But I would like to start work on my dissertation as soon as I can, to give myself enough time and preparation to do "distinction level" work. 

How do I come up with a topic I'll stick with? I've had tons of advise from different sources telling me to choose from an area of interest. Considering I still have the bulk of my degree work ahead, this wasn't too useful for me. Do I read all areas ahead of the units to "fast forward" the process?. Any advice is welcome.
This is a classic example where talking to your advisor is of the utmost importance.  Some advisors want their students to choose a topic as early as possible, and others don't mind if their students take their time. As for the topic, hopefully, your advisor should be able to point you in a direction if you don't already have one.

While I understand the rush to get started on something concrete, you really don't want to do a lot of work on a topic that ends up being (1) uninteresting, and (2) unfruitful.  Talk to as many other faculty and students as you'd like, and there isn't anything wrong with reading ahead, with the exception that you might not understand something well enough to make a good decision about whether you should do research in the subject.

My bottom-line suggestion is to take your time picking a topic, because you really do want it to be a good one.