Having penpals.
Going out to play all day with friends. Taking our bikes with a carrier bag with some sandwiches and a can of Lilt (god just thinking of that now makes my teeth hurt) hanging from the handlebars.
Nylon carpets, nighties and sheets with lots of static shocks and sticking to things.
People with dogs buying 'dog's meat' from the butcher (mostly offal/rabbit/beef bones) then boiling it up and adding dog biscuits instead of buying tins or kibble. For a treat my mum used to mix a bit of gravy into it.
Regular power cuts.
Bath once a week and getting a top up of hot water from the kettle instead of putting the immersion heater back on.
No central heating. Getting dressed under bed covers. Running downstairs after a bath to get dried and dressed in front of the coal fire.
Boys and girls not always being allowed to choose the options for O Levels they wanted, some were restricted to one sex.
Being told off by the headmaster for doing typing as one of my subjects as it was for the 'non academic' girls and I'd never use it...there was no concept of computers being part of everyday life and work in the future. Touch typing is the most useful thing I learned at school.
National anthem when the TV shut down. The TV shutting down overnight.