Stay on the left
Driving is fairly widespread in Australia because public transportation isn't always the best, however this varies by city. So, when driving, remember to keep left – which is simple if you're from the UK. If you're out walking, make sure you glance to your right before crossing. Alternatively, look both directions numerous times before crossing, as this is something you should do anyhow.
Most people are aware that Australians drive on the left side of the road, but did you know they also walk on the left? Many people surprised that more countries haven't embraced it because it appears to be a very sensible system. The ordered road system in the UK, for example, disintegrates moment you're on the pavement; you can walk on either side you wish.
But, thank goodness, there are laws to obey when walking in Australia. Keep to the left unless you're on an escalator. Walking on the right is not illegal, but it will make folks think you're a moron.