Nice. I'm doing Reshaping and Owned this semester, both have been about an 8/10 on the urg-yay scale.
Next semester I've got the lovely combination of Natural - Urban - Governing - Designing.....
Any tips/notes/advice/help/etc. for Natural, Urban, or especially Governing?
Just thinking of Reshaping makes me shudder. Just a santorum of guest lectures and preachy environmentalism with no clear focus. When I did it, the first assignment was about how "sustainability" is such an unclearly defined term to the point where it shouldn't be used, then the rest of the course is on how to use the concept of sustainability.

Natural's good but pretty boring. It's by no means difficult, but unless you're thrilled by rocks, adiabatic process and biomes you'll probably find it a bit dull. In terms of advice: find a good group. You'll have a site visit to anywhere from a park near the CBD to out woop woop in Arthur's Seat (group's choice). The exam is pretty straightforward if you know the lecture material. I don't know if they still prescribe a textbook, but if they do, don't buy it. I've got some fairly detailed notes for Natural, so PM me if you want them.
Urban's good, but I'm somewhat interested in city planning and so on, so it played into my interests. The main lecturer, Ian Rutherford, is really good. The content is interesting, and the assessment is actually enjoyable if you like wondering about the city. Advice for urban: talk in tutes. In pretty much all discussion-based ENVS tutes I found about half the class was deathly quiet. Whether there's assessment for participation or not, tutes are always less of a chore when you actually get involved.
As for Governing, you'll either love or hate the subject. I think the majority are on the love side, but I don't think there's much middle ground. It's pretty much the anti-Reshaping, which is probably why I liked it so much. The lecturer is a pretty divisive guy, but he's by far the most entertaining lecturer I've had at uni so far. About half the lecturer is on his smoking, beer drinking and Collingwood supporting, and the rest is actually on Governing Environments. But the subject really asks you to question, justify, and express your opinions like few others. Assessment is fairly easy and extremely gradual (you have an in-class test roughly every month) and there's no big and arduous assignments at all.
I got pretty good marks for each of the subjects, so let me know if you have any questions.