Before leaving, make standard copies and scanned copies of all documents.
Send the scanned copies to your e-mail, and put the standard copies in several different places – believe me, this is very useful if your passport is stolen.
Do not carry a lot of cash with you – especially in one pocket.
Moreover, it is better to pay with a credit card- at least if it is stolen, you can always call the bank and block cash withdrawal from it (it is better to take care of the bank number in advance – it is not a fact that the Internet will be on hand during the trip).
People say that if you put a photograph of a small child in your wallet, the chances, that the wallet will be returned, increase significantly. Try it!
Do not exchange money from locals.
It is better to overpay a bit in official currency exchanges than to get counterfeit money.
Snakes, spiders, crocodiles and sharks.
They are a lot of them in Australia. If you go to protected areas, correlate your routes with safety information and specify what lives here. Otherwise, there is a risk of encountering a not-too-friendly fist-sized spider or a poisonous snake. Do not walk without shoes, watch carefully where you put up the tent, if you choose camping.
Watch the weather forecast in advance.
Australia is a hot country, but it rains at almost any time of the year. Moreover, take water with you, trying to replenish it at any opportunity. You can take water in the springs, but you should not drink from flowing rivers and streams.
Most public places in Australia are non-smoking.
This is a social norm, so the signs are not everywhere. Check the places if you do not want a law enforcement officer to approach you with a logical question.
Be extra careful when traveling around the country by car.
A kangaroo often crosses the road, and the forests and fields are dry. A random cigarette stub can lead to fire.
There are significant distances between cities.
In case you drive a rented car and stay away from civilization, be vigilant. There are usually many warning signs. If it is a wild beach, there will be some designations regarding flows, rocks and other things. When you do not see such signs, your attentiveness remains the key to security.
All in all, Australia is a wonderful and friendly place for your trip. Simple rules, mentioned above might increase your chances to avoid any issues during your journey significantly.