Just wondering if there's anything I can do to "prepare" my nipples for breastfeeding this time around?

Will the fact that I have breastfed previously work in my favour or is it like starting all over again?

I had a horrible time for the first few weeks breastfeeding DS, I needed to use a shield etc as my nipples were badly cracked and I'd really like to avoid that this time around if possible. I think the fact that I know how bubs should be latching will be beneficial too won't it?

Thanks