Cloth nappies and not with trendy artwork on them.
Breastfeeding and cosleeping not as a thing just normal.
Being breastfed on mums lap in the passenger seat driving on the motorway (obviously don’t remember this, just been told!)
Never giving any cheek
Playing down at the river unsupervised with friends from about seven
Playing quietly in my room
The boring meat n two veg until whole family went veggie late eighties, then it was always lentils or nut roast or risotto type stuff, usually fairly strange
Thai food, sushi, smoothies, good coffee all totally unheard of. No coffee shops to socialise in just greasy spoons or tea shops that seemed to be exclusively for old ladies. You couldn’t buy things like boxed sandwiches and chopped fruit in shops and petrol stations, if you were working you would take a packed lunch or you might have a canteen.
Kids not allowed in pubs, pubs were scary smoky places
One hour of kids tv per day and other than that only seemed to be old war films or Westerns (DS aged 8 has said to me “But mum, we only have four channels now! Amazon, Netflix, iPlayer and DisneyPlus!)
Reading the funnies in grandpa’s newspaper
As a teen, phoning best mate every afternoon on landline for an hour and running up the phone bill. I loved the landline, which we only got when I was ten. Still much prefer calls to texting, texting can take ages and sometimes makes me really anxious.
Watching same videos over and over til you could recite the film, because most people only had a few. Basically Little Mermaid, The Bodyguard, Top Gun and Groundhog Day 
Disney only brought a new film out about once every 5-10 years, then you just watched it over and over.
Dad and grandpa practically built their own houses with minimal input from tradesmen, also fixed their own cars and did everything around the garden. Things were constantly in need of fixing though and the house was never perfect or very tidy.
Hand sanitizer and wet wipes weren’t invented or even thought of.
No uniform or homework at primary, no uniform and little homework at secondary. Learned touch typing and how to make a scotch egg (boil an egg, wrap a square sausage around it, dip in breadcrumbs and bung it in the deep fat fryer).
The BBC computers at school, when you got towards the end of a line you had to press space space space because it didn’t automatically move your word down to the next line.
I went off to uni at 17 and mum n dad had no way to contact me directly except write a letter! I’d save change and ring them up once a week or so from the pay phone in the halls of residence lobby.