Stay as close as you can to the railing during the race. It helps to prevent exhaustion. If you are lucky, you will be in the first or second gate, which is closest to the rails.
Stay a little farther away from the group until you break. This allows your equine to gather a sudden burst of energy while the others ahead, from going too quickly, are losing pace.
Be sure to practice not to exit the gates late; you want to be by the rails first.