I thought as there's lot of newbies arriving in the next few months, it might be a good idea to have a thread of local money saving tips that people have discovered since being here. So I'll start off...
Cheap Tuesdays - most cinemas offer cheaper tickets on Tuesdays for some reason: usually adults at kids' prices. When we first arrived we went off blithely to the pics one night and nearly had to take out a second mortgage to do so....it wasn't on a Tuesday! Also many places offer Kids Eat Free deals on Tuesdays...what is it about Tuesdays??
Petrol dockets - shop at Coles or Woolworths, spend more than $30 and you get a tear off coupon at the bottom which saves you 4cents (or sometimes 8cents) a litre at their petrol stations.
On the subject of petrol - the price goes up and down on a daily basis. There used to be a specific day it was cheaper, but now that keeps moving around: keep an eye on the petrol station price boards and fill up when it comes down - often by up to 10cents a litre
Daily deal sites - if you like eating out, beauty treatments etc, sign up online for the daily deal emails (if you google "All the Daily Deals Adelaide" that will give you a summary of all the local ones). You pay up front for a voucher, but can often save at least 50%, often more. Keep an eye on voucher expiry dates though.
Haggle - when buying furniture, electrical goods etc, always ask if the salesman can do a better price. It's expected here. If they won't come down in price, see if they'll throw something extra in for free instead. Us reserved Brits sometimes have a problem with this, but I can assure you most locals don't!
Toy Sales and Layby - the big toy stores (Target, KMart etc) often hold toy sales with big reductions. You can choose what you want to buy, get it at the sale price, and then they'll store it for you till Christmas - you can pay in installments up to then if you wish.
Junk mail - keep an eye on the bundles of junk mail that gets delivered to your door. Often stores will do "loss leader" type sales on some items/foods so it's worth planning your shopping around that. They're not yet as good as the BOGOFF deals in the UK though, but every little helps (as Tesco would say!!)
Books/CDs/DVDs - join your local library: borrowing is free, fines are ridiculously miniscule, some libraries also loan toys. Books are very expensive here: use www.thebookdepository.co.uk to buy at UJK prices and free international postage (books arrive in about 7 days to Oz)
Toiletries - generally quite expensive in most supermarkets and chemists, but keep an eye on the "cheapo" shops (Cheap as Chips, Cunninghams, Browse in and Save etc) as you can often pick up stuff very cheaply from there, unless you're very precious about sticking to one particular brand!
That's all that I can think of at the moment - anyone got any more?