Everyone should have a chance to live in another country. I'm an American who's lived in five countries and am currently living in France with my lovely French wife. This blog is about finding opportunities abroad and the challenges you'll face.
Are you 18 to 30 years old and fancy a year in Australia? Take a working holiday in Australia! The rules will vary slightly based on your country of origin (for example, here are the Australian working holiday rules for US citizens), but basically, it's a scheme designed to attract young people to the country — many countries seek young workers — and it's fairly easy to qualify for. Just keep your nose clean and save up a bit of cash for the initial flight.
I have friends who've emigrated to Australia and others who were raised there who will cheerfully tell you what a fantastic country it is. Were I younger, I would jump at the chance. It's a great way to dip your toe in the expatriate water and decide if living abroad is really for you. As I've mentioned before, many people find it hard to live far away from friends and family, but if it's for a fixed amount of time, perhaps it's easier to deal with.