oorain got in before me but it's an old one I love to say:
"last but not least, the days when the air was clean and sex was dirty"
I remember most of the above (only skimmed through so hopefully nobody mentioned the baker coming around in a horse drawn cart, also a guy selling rabbits. We reminisced the other day about my brothers doing the 'milk round' i.e. as schoolkids sneaking out in the middle of the night and going around pinching some of the milk money left out to pay for the milkie. Not what I would condone now! Along with blowing up someone's letterbox in the area on Cracker Night.
Having your brothers rebuild an old holden in the back yard shed.
Drinking beer out of 'longnecks' (there wasn't any option).
I could go on but the best I've heard was 3 old fellas in a bar trying to outdo each other with recollections. The winner said "my earliest memory was going to a party with me Dad, and going him with me Mum". Hopefully, that isnt too hard to work out!