What can I do before my baby arrives?

I'm not due with my 2nd for several months, but with my 1st, I had a really hard time with latching, exclusively pumping, and keeping up with supply and demand. When I eventually had to supplement with formula, I felt so ashamed. I know every baby and (post)pregnancy is different but I can't help but anticipate more difficult times ahead. Is there anyone out there that has any tips for being proactive about breastfeeding?