Victorians.
No, seriously, living in a tourist mecca you get to see some pretty atrocious driving....
Everyone:
learn how to read roadsigns - when it says "keep left unless overtaking" it is not a suggestion...
roundabouts - read the road rules,
then drive
Stop signs - again, not a suggestion - stop means stop
Emergency vehicles - hear siren, pull to the left
and let them past 
Rubbernecks - wackers that drive one of the finest cruising roads in Australia, the Captain Cook Highway from Cairns to Port Douglas, at 30kph and swerve across lanes pointing at the scenery.
Americans:
figure out which side of the road to drive on, particulalry divided roads
Backpackers:
no, your clapped out 1984 Nissan Urvan is not a Ferrari and you should not be hogging the ridiculously short 500 metre long overtaking lanes trying to sneak past that b-double.
