When possible, go with a friend. If you're having a great time together, you have a safe base to invite others into the fun. :) If you're going solo, try to befriend another singleton and from there you can scoop up all the other singletons to form a mob of supportive conference-goers.
And always have your hand sanitizer at the ready. You don't want to get sick mid-conference!
Wear a statement piece of jewelry, even better if it has a story to share when people ask. Mine was bought from a Bedouin who gave me a roadside camel ride on the way out of Jerusalem. He said it was made by one of his wives & the polygamous arts & crafts story usually draws a smile.
Long days. I need chocolate. And sunglasses for when I take a break outside. Chocolate at conferences is kind of one of my trademark moves as well. I assume that since I want it others will too & sharing things I love is always a fun way to meet new interesting people. And of course, you always want to have a business card handy...