One item we learned from these boards is clothespins.
The shower curtains tend to be a bit flimsy. Attaching a few clothespins to the bottom of the curtain weighs it down and keeps it from blowing out and causing a puddle on the floor and also keeps the curtain from blowing in and sticking to you in the close quarters of the shower stall.
YMMV as some have reported bringing and not needing them as they had no trouble with the curtain. I don't risk it and just pop those puppies on the curtain when unpacking.