I'm planning a trip to Melbourne, which is only a short plane trip away from Sydney, and currently I'm planning on using the same information sources to plan my trip that I'd use for anywhere else in the world (Lonely Planet, Trip Advisor, WikiVoyage).
There's the possibility that I'll be sightseeing with someone visiting Australia for the first time.
I'll have a slight advantage in that I've been there before, so I can give my opinion on certain attractions, but apart from that, I won't be able to give the overseas tourist any "local knowledge".
The situation wouldn't be much better if someone were visiting Sydney (where I live), either. I'd be able to tell them about Sydney's transit system, and what time things close, and what suburbs are a bit dodgy. But in terms of places to visit, I'd only be able to list places that are fairly well known.
Is my lack of "local knowledge" unusual? What can I do to improve my local knowledge?
Related question: How do you avoid "tourist traps" when traveling to a country where you do not speak the language? , except that I'm supposed to be the "local knowledge" to avoid such "tourist traps"!