Like what? Banning plastic straws? Erecting more Don Quixote enemies?
Straws would be a start, then we could think sbout the zillions of plastic flip-flop shoes that I heard are even more prevalent on beaches - as washed up junk - than bags, even. The shops here are doing a good thing with bags: they charge for them now. I have been reusing mine for months and they hold up perfectly well. The car has climate: I tried it when new to make sure it was working - after figuring out how! - and it hasn't been used since except for the very rare times I have to hit the motorway, when the main reason I close the window is to prevent getting pebbles and rubbish in my face. The home unit hasn't been on in decades, other than to check out it works.
I discovered my legs a couple of years ago, and now driving is only for heavy shopping; the klick's walk into the port and a supermarket does me good. I even use the iPad most of the time instead of the desktop computer and the monitor. How many lights do I need to have on to use it or watch the news or Montalbano? Tiny things, multiplied by households, and they achieve something to the general good. And save us money, which is a pleasant side-effect.
Everyone can find little things they can think about in their own lifestyle, things that have no purpose whatsoever but, nonetheless, churn up the bills and waste energy.
There doesn't have to be a total revolution to get things going in the right direction.
You only have to examine your own style of living and can find all sorts of tiny things that add up.