Originally Posted by Dave Paton
I would recommend getting someone who knows about Oly meets to coach you at the meet. I would've been lost if I didn't have a coach at my first meet. And by coach, I don't mean someone to correct your form etc, but someone who knows how oly meets work. A few guys didn't have coaches or teammates at the meet and they looked a little lost and not really enjoying themselves.
This reflects my experience, too. I learned more from lifting with experience lifters in a competition than I did in several months of lifting.
Pick your weights conservatively, try to hit 6 for 6, and watch what the other guys do (how long they take between attempts, how they select weights, etc.). Have fun.