Take care of the flying bottle.

Best beach in the world! Very fine white sand and great waves. Seriously good pubs with live music.. try the landmark OBH (Ocean Beach Hotel). Plenty of surfie style shops with trendy clothing, cafes and restaurants. I think they now have parking meters now... bummer! Sunday sessions are extremely popular and there are plenty of pubs to choose from. There is also some bus tour that goes from pub to pub from the city to the beach and I heard it was really worth doing. Find out what the shark alarm sounds like so you know when to get out of the water... helicopters fly up and down the coast watching for sharks, etc. So, plenty of warning is usually given but sometimes fools ignore the alarms and keep swimming.

If you're heading out at night in Australia and are under the age of about 30 (or 35 if you look young) make sure you take ID.  Australian security are unbelievably strict on checking people are over 18 before they are allowed in and will only accept an Australian drivers licence, a proof of age card from the state that you are in or a passport as proof of ID.  So I'm afraid for the internationals that means taking your passport out at night.  The chances of getting in without it though are slim- I'm 28 now and still can't get into nightclubs in Perth without ID!

Perth is a very expensive town to visit, so be prepared! A great day trip is the wineries around Margaret River. There was a bit of problems with the Aborinigies when I stayed closer to the town center.