Bring a Portable Phone Charger
It's the 21st century: the digital age. AND it's New Year's Eve. Chances are, you're going to be on your phone taking pictures... and then Snapchatting, Tweeting, Instagramming, and Facebooking those pictures. Do yourself a favor and bring a portable charger around so you don't have to miss out on snapping the memories.
[Photo via @womenwholovewine]