I am grateful to all the blogs that I've browsed through which had given me invaluable inspiration on planning this trip. So I thought maybe I should chip in my bit to share my trip, just so in case someone bumps in.
At the airport
Make sure you grab the free official Sydney tourist guide at the Sydney airport. Not the Chinese one, not the Korean one, but the English one, and one for each person. Cos only the English version has discount coupons at the back and each coupon admits one person.
I would have loved to chuck my mobile phone aside and stay primitive if not for all the planning I've done on Google map. And also for getting around which I will elaborate later. Roaming costs bombs and I needed a local number to arrange for local day tours, so before the trip I actually bought a 'yes' Optus prepaid SIM card. The card itself costs AUD$2, of course would cost more if you need it sent to you before the trip to do the necessary registration et al. Don't activate it too early cos it expires a few days after activation if you don't charge up the credit, which itself also has expiry date. And then you can sign up for which ever prepaid plan that suits you. I chose the 2 Dollar Days plan which basically costs AUD$2 per day for unlimited data and local voice. Oh and my phone almost went out of juice. Better to bring extra battery if you don't want to buy a travel adaptor.
If you are a public transport freak like me, you'll love Sydney. You'll need a degree of street-smartness to be comfortable commuting on the various rails, buses and ferries of Sydney. For example, Central Station has dozen odd platforms, even the station near my hotel has 6; But with a mobile phone and data plan, the NSW Government's Transport Infoline website comes in VERY handy. If you want convenience of not having to buy tickets every time you take a ride, I highly recommend getting the MyMulti weekly pass. It allows unlimited rides on buses, rails (except monorail) and ferries. By the way I love the CityRail experience and I shall write on this separately.
Depending on what you are looking for, for me it was the local products experience. Checking out the mainstream supermarkets like Coles and Woolworths was great experience for me. This may sound odd for people on trips, but I think this is one close experience (besides the public transport) of life of the locals. Do check out the fruits :) By the way, shops close pretty early, so grab the goodies (same goes for dinner) before they close for the day.
I can't emphasize this more. If you don't wear sunblock, at least wear a hat.
This is not really a tip, but a little reflection. It was my first time spending Christmas in a western society (erm, also the south-most and east-most, if you go by longitude and latitude). The festive atmosphere was great, people in the service industry greeted people merry Christmas, even policemen wore the Santa hat on top of their uniform cap. And I think I saw a giant inflated Santa on a navy ship. The bad thing is, almost everything closes on Christmas day. Some even close from Christmas all the way to next year. Inconvenient? But hey we Chinese also take long break during Chinese New Year.
Hospitality (or rather, the people)
You can't beat the Aussie's hospitality (maybe minus the hotel staff I met) Be it supermarket cashier or bus driver or train conductor, they chat you up and they looked like a happy bunch. Happy, relax, friendly, efficient, but definitely not laid-back. At first I was a little uneasy when the supermarket cashier asked "how are you", but subsequently I greeted back and a short but wholehearted conversation began. Almost everytime every counter I went. Now compare this with the hello-welcome-without-glancing-up attitude that some of the service staffs we have in Asia. Man, I think these people really love and respect their jobs!
Maybe I'll share my itinerary another time :)