It's hard to say really.
Make sure you study properly, and most importantly
exercise/stay healthy
IMHO That's definitely not playing the system, that's being a very good student!
For me, playing the system would be;
Taking subjects that scale considerably well (at least one language)
Seeking out the most elite tutors and draining them of every bit of knowledge you can.
Getting access to resources most students don't have, for example AN/VN.
Most importantly, doing no study all year excluding the few nights before SAC's, and then spamming and spamming and spamming every practice exam ever made for all your subjects in the months leading to your exam.
[ My biggest fear in life is that I'll play the VCE system too well and get to university and fail hard

]