Part of my weekly purchases include a loaf of bread, organic milk, organic yogurt and organic eggs.  In addition to recycling the milk carton, organic yogurt container and egg carton, I have recently begun to reuse the bread bag.  When I come to the end of the loaf of bread, I store the bread bag away and use it for (surprise, surprise) holding lunch sandwiches and/or snacks on the go.  It seems so silly to me to use a ziploc bag, when the bread bag that was just previously holding the bread will do the job. 

If you really want to be adventuresome, trying baking your own bread.  It only takes milk, eggs, flour and yeast.  I buy yeast packages in bulk so when the baking mode strikes me I am prepared (most people already stock the milk, eggs and flour).