I try and buy produce like jam, honey, syrup, oils, etc in glass jars and bottles. Friends who make jam are grateful for the cleaned bottles when finished with. Coffee always comes in glass as well. Douwe Egberts jars make lovely storage containers for lentils etc and there are different sizes.
Cooked food can be stored in metal or ceramic with a dish on top in the fridge, to minimise use of cling film. Tried to do without cling film at one point but very difficult. Our rubbish is incinerated so started to use it again in a very minimal way and it goes in the bin. It's very thin so burns easily.
I do think more use could be made of recycled card/paper mache containers for veg and fruit.
Unwanted books, toys and smallish items etc are wrapped, put on our wall and offered to passers by. A roving man with a truck picks up metal, electrical items etc if bagged, labelled, and put on the wall. We have LED bulbs throughout, and that made a massive difference to bills.
As for clothes, only natural fibres for me, and eBay works wonders for recycling. Daughter recently furnished her new sun room all from eBay, and refurbished by her. Sofa, chair, small chest, lamp stand etc. It looks brilliant and not dated, even tho some of the items are from the 60's when furniture was better made in her view. She buys many of her clothes on eBay too. The turnover is amazing (who knew she needed so many dresses) but after a few wearings she cleans them and sells them on. She tells me that many of them are unworn, most worn just a few times. Almost like renting them.
We've always used bar soap. Being aspirational, Imperial Leather has always been my soap of choice since my Mum used it. (She was aspirational too.)
And for the gran who commented about bacteria and possible contamination of soap bars, perhaps we should be aware that we have many different microbiomes which are collections of beneficial and not so beneficial bacteria in happy balance, mostly. Not just in our gut, but lungs, skin, pretty well everywhere. Some make vitamins we need.
Thanks, fellow grans, for all the tips above. Some I can add to my own.