The grocery store next door - SMART - has started charging folks extra for plastic bags. Just a buck each, but you do see some folks getting their own bags or refusing bags for just a couple of things they could carry home.
Also, started keeping aside plastic packaging (milk, bread, cereal, and pretty much everything else!), tetrapaks, etc in a separate container for pick-up by our cleaning crew who said they can make some extra change by selling it at the local kabaadi-wala. A lot of the organic waste already goes to the composting bin. The fill rate for the dustbin has fallen dramatically again!
A couple of more residents in our apartment complex have picked up cycling.
And a lot many are interested in the bottle-in-the-flushtank idea.