Do you BYOB when doing groceries? That reads "Bring Your Own Bag". Since we've lived in Melbourne for more than 2 years now, we've practiced bringing our own bags when doing groceries (unless when we do want the free plastic bags to be used as trash bags in the kitchen). Bags like these ones by Envirosax are very handy to carry. They are light, can be folded and rolled very easy, and very small to snugly fit into my day to day bags. And they're able to carry a lot of stuff too. Not only we'd be doing our part as Khalifah of the earth by using less plastic these days, they look nice too :) Most importantly, they are a lot more durable than the biodegradable plastic bags that tend to tear very easily when you buy food with sharp edges like a bag of chips. I must admit, sometimes when I forget to bring my bag for groceries, I will use the supermarket's plastic bags. But they are often used again as trash bags in the kitchen. It takes time and regular practice to make BYOB part of our daily/weekly routine, and once you get the hang of it and become more conscious of your contribution to the earth, it'll easily become a part of your daily life.