Great to hear about things other people do. Just wanted to comment on a few things on your list...
Absolutely. Anything we can do to reduce the number of plastic bags that get directly tossed into the trash is a good thing. Small plastic bags work great for small trash cans, but I always grab the oversized bags when checking out at Menards. I use the large plastic bags for our kitchen trash can. Fits perfectly. I have not purchased any trash bags for a number of years.
Composting is one of my favorite topics. Before I had chickens, I composted our food scraps and unwanted leftovers. Now that I have chickens, they eat almost all scraps and leftovers turning it into chicken poo and speeding up the composting process.
I converted my entire chicken run into a chicken run composting system. It provides me with more compost than I can use. It's a wonderful resource. I tell people that I have composting chickens that also give me eggs as a bonus. We sell excess eggs to friends of the family, but my biggest return on the chicken investment is all the compost I harvest every year from the chicken run. I have saved hundreds, and hundreds, of dollars using my chicken run compost instead of buying bags of compost at the big box stores.

When we were younger, we used to can a lot of food. But Dear Wife reached a time where she determined canning was too much work. So now we just freeze large batches of soups and other dishes.
Although lots of things can be reheated quickly in a microwave oven, when it comes to bread-based items, I use a small toaster oven or our air fryer. No need to heat up the large oven. Saves time and money.
Back in the day, we used to fill up many large trash bags every week with the bulk being paper products. Now I shred almost all our paper products to first use as chicken coop bedding, then tossing the used bedding into the chicken run to compost, then the chicken run compost is used in my raised bed food gardens.
Laying cardboard down flat is a good, compostable, weed barrier. I used to do that and then toss on grass clippings to cover the cardboard. It looked nice and it all broke down into compost to feed the soil.
Now, I shred almost all our paper and cardboard products. Over a number of years, we went from about 3 large trash bags per week for the dump, to 3 bags per month when our town set up some drop off recycling bins. That was a big improvement. But then we got chickens so almost all our food scraps and unwanted leftovers now go to the chickens. We have very little trash these days.

I live in the country, so I am able to burn some of our garbage in my firepit. With recycling everything we can, shredding all that paper for coop bedding, and feeding just about all our food scraps to the chickens, we are down to about one bag of burnable trash per month. Most of that is just wet, soiled, paper from food packaging. It has been almost 2 years since I have had to take any trash to the dump!
Hope to hear more from you in the future.