Emergen-C. I read it on here, actually, and tried it on my last trip in August. Works wonders. I use it at home as well. Although I try not to drink to excess, sometimes a bachelorette party gets in the way! Anyway take it before you go to bed, it helps a lot. I also highly, highly advise drinking water throughout the day and eating regular meals. The bar will be there, no worries! Personally I dislike rowdy crowds getting hammered at the pool bar. Kind of ruins the atmosphere. Believe us all when we say pace yourself. It's not a race and it's shitty to be hung over in paradise.