When I was pregnant I read as much about natural remedies as I could. I was a little rabid about it actually. When my daughters were babies I kept them away from all pharmaceutical baby medicines and instead used natural remedies when they were sick like rubbing garlic oil on the bottom of the feet, using Echinacea when they were sick, using tea tree oil when they got a rash, and juicing organic fruits (especially apples, oranges, and lemons) when they got first started getting the sniffles.
Earth Mama Baby Angel, a brand I trust and used when my girls were babies, has a free herb eBook on their site. Make sure to check it out. It has great information in it.
On the Net: www.earthmamaangelbaby.com/herbs-for-breastfeeding-ebook