GREEN SHIELD STAMPS!!I can remember much of the above. To this day I can still do mental arithmetic in £sd.
As children, we had to memorise the family Co-Op divi number as we were often sent out to get fags for our parents. Another of our jobs was to collect the coupons from the cigarette packets and bundle them up for when Mum and Dad wanted to get something from the Embassy catalogue.
We were also in charge of sticking the Green Shield stamps in the books, too.
Good memories, that! And for those getting the jitters from lack of exposure to said 28.8 (or the, in comparison, incredibly fast 56K!) modem dial-up sound, here's your solution: https://www.dialupsound.com. *Ahhhhhh*The dial-up connection tone.
Remember it from my childhood but I doubt many kids these days know it (I'm only 26 as it is).
Edit: this includes being unable to use the phone whilst connected to t'interwebs.