Bring an extra ad or two. When people in line ask to see your ad, give them an extra incase you never see it again. This also helps later on, if you need something and they can help you get one in exchange for letting them borrow the ad.
Bring an extra sweatshirt or blanket. Just because it "doesn't feel that cold" when you first step out into the cold, doesn't mean it won't get cold when standing outside for a couple hours.