Excellent Topic, SJ!
One other thing apart from all the other good points mentioned by all above..........COMMUNICATION!
TELL people what you are doing. Lodge a SARTIME or flight note and activate a SARTIME for EACH LEG of the flight if possible. If you deviate from your flight plan for ANY reason.....TELL SOMEONE! Pop up on Centre Area Frequency or Flightwatch and advise the detail. Don't worry if this p*sses ATC off, if AusSAR come looking for you ALL the relevant tapes WILL be played back.
Go safely, all!