1. All Australian citizens over 18 need to register with the Australian Electoral Commission in order vote
You'll need to be enrolled by 8pm 23rd of May with the AEC and then turn up to a polling centre on polling day.

Source: AAP
2. Once registered, you can be fined if you fail to vote on or before polling day
Even if you're already enrolled to vote, if you've changed your name or address you need to update your details with the AEC.

Source: AAP
3. Many parties will hand out how to vote cards
You should vote for the candidate of your choice and not be misled by material you might receive at the polling place.

Source: AAP
4. Candidates are elected by a preferential voting system
You will be given two ballot papers. The green ballot paper is to elect a local candidate for the House of Representatives. While, the white ballot paper is for electing a senator from your own state or territory. In the Senate ballot you can mark your preferences by party above the line, or number their preferred candidates below the line.

5. Overseas and postal voting
If you are overseas voters, ballot papers must be completed and posted back to the AEC on or before election day.

Source: AAP