http://www.nbci.ca/index.php?option=com_content&view=article&id=27%3Amyths-of-breastfeeding&catid=5%3Aarticles&Itemid=17&limitstart=1
If you read through these myths on nursing, you'll see you don't need to drink extra water or deal with pain...there are 4 pages so make sure you tab through them all. They are VERY informative.
Dr Newman is highly recommended & has served as an adviser to organizations like the WHO on breastfeeding issues & runs the breastfeeding clinic in Canada.