All the tips you have for first time breastfeeding Mom.

I'm currently pregnant with my third child. I'm still early, only 18 weeks, but so excited to breastfeed my daughter when she gets here. When I had my second son I was not comfortable enough to breastfeed for a number of reasons so I pumped until I dried up due to not pumping consistent enough. :/ Anyways, I'm really reaching out for any and all tips to come with breastfeeding. Questions like: What's the best pump to purchase? What can I do to keep a good milk supply? What can I use to keep my nipples from getting chapped and/or sore? Any information at all would be so greatly appreciated. I want to be fully prepared for when she gets here!