As long as you've prepared adequately, you have nothing to worry about. The race Remember, you're there to finish. Don't let excitement or the pull of faster runners make you race faster than you've been training. Try to run relaxed and stay aware of your surroundings-running in a crowd full of people is very different from a solo jog. Keep your eyes open for potential collisions, especially at water tables, where people have a tendency to congregate and slow down all at once, and the ground can be wet and slippery.
Runners invariably swarm the first few tables of each station.
Pass them and then grab your water where it's less crowded. Pinch the top together to keep it from spilling as you move. If you're not used to drinking on the run, slow down or even walk as you drink. Better to lose a few meaningless seconds than to end up coughing with water up your nose. As you savor your accomplishment, don't forget to stretch, drink lots of water and enjoy the post-race festivities.