Your mum was a wise woman.It's nigh on impossible to shop in a way that finds all the best prices and beats the supermarkets -- a lot of their game is befuddling the consumer. So, prices may stay the same but packages shrink in size. Or they'll have a value range but the number of products available will vary or decrease, or they'll suddenly rebrand it so you can't find it anymore.
My mum was a very good household manager and she taught me a couple of things which stand me in good stead:
1. Anything that's on display at the end of the aisle or near the checkout are probably not good value. The store is literally flooding you with those products.
2. Always look at the products stocked either low or high on the shelf because everything that's at eye level is likely the one the shop wants you to buy.
3. Bulk buy if you can, but only if you will use the stuff before it's out of date and you have space for it.
4. Don't look at the price tag but the price by weight. Because that helps you figure out what's lowest price, even though the packages of different brands might also be different sizes.
Look for pasta, for eg, and Barilla will be £0.60/100g and Sainsbury's Own will be £0.40/100g.
It's hard work, initially, but you get used to it and it works both in the shop and online.
I worked in an Asda whilst at college and all of the above is spot on. Fwiw, the end of aisle is called a 'gondola' and never, ever buy anything on it.
I learned some stuff at my year and a bit at Asda, mostly it was shop at any other supermarket because Asda is just shit. Not good value and not good standard of products.
However, unlike Jack I didn't learn to fold towels in the non existent 'towel department ' and I never fingered cheap wet ham nor learned about curing meat on the deli.
I did have some good times, which Jack doesn't seem to have had. The fish counter got a delivery of crabs once and didn't realise they were live until they opened the box and the crabs made a bid for freedom.I can still hear the screams and the laughing. The Christmas party was amazing. The girls in the office were lovely and I loved sneaking off up to their office above the warehouse for a cheeky fag and a brew.
Jack never talks about memories like this. I'm guessing it was because no one liked her.