I had a boss many years ago that chose to go on a personal crusade about litter around our office and the yard. He did so by picking things up himself. I think he was trying to lead by example. Unfortunately nobody else followed suit. Years later I realized that all he had done was make himself accountable for picking up litter and not setting that expectation of a cleanliness standard for everyone else. The degree of change for so many people in our environment was so much that they didn’t understand what he was doing or why he was doing it (most wondered if it had been made part of his job description or why didn’t he employ a cleaner).
The next boss took on the same crusade by appealing to everyone’s values, and asking them if thy were happy to live that way. He said that he wanted a zero rubbish site, and it was everyone’s responsibility including him. He was to be seen picking things up, but also pointing out to people who were sitting in a mess that they were doing so. Gradually it became part of everyone’s radar. I guess that’s how I took the path I did.