Always check luggage weight allowances and what is prohibited in hand luggage. Australia is very strict at customs, so do not forget to dispose of any fruit, animal products, and they are obviously very keen on doing drug searches, so expect to have sniffer dogs sometimes checking around your luggage. Do not exceed duty-free allowances.
Always keep hydrated and do not get sunburned. You will be surprised how pale most Australians are, they generally do not “sunbath”. If you plan a day in the sun apply high factor sun scream and make sure you take time out in the shade. Signs of heat stoke can be feeling light headed and headaches.
Be aware of bush fire warnings, which are regularly signed in the hinterland areas (e.g high or low alert). Always adhere to warnings and only use designated areas for camp fires. Ensure that they are completely extinguished before you leave an area. Never throw cigarette butts into the bush land, but dispose of properly. Always ensure someone is aware of your whereabouts and intended route if you venture on a bush walk, or trek.
Avoid poorly lit areas and parks at night. Buses and trams are generally safe even at night but keep alert and aware at all times, trains maybe a little dangerous at night as most stations are not staffed after working hours, if you miss your stop there is a long wait until the next train.