Whenever i go to the market to buy something, i make it a point to carry my bag along so that i dont have to take extra polybags from shopkeepers with every article i buy. If something can be kept in the bag without it, its good. Since i do this everytime, some of friends have also started doing it. Even though we are not large in number, but each one counts.
Also, i know of an organization wherein they keep a record of how much food was wasted the previous day n display it in the canteen. This has helped people realize how much food they take and do not eat leading to wastage. And it has evetually decreased over a period of time. People take as much as they need now.
Shivani