As a mother who has nursed three children, I know all too well how thirsty a nursing mother gets.  So, one of my favorite things to do when I see a mom nursing her baby in public is to bring her a drink of water.  At first, I used to ask if she was thirsty, but most women are too polite to answer honestly, and since I know that nursing moms need a lot of water, now I just bring them a cup without asking.  They are always so appreciative, and I like showing my support for them in this way.  I hope that sharing this here will inspire others to do the same!