Maintain your equipment and keep it in good condition as you don’t want to lose a race just because a propeller comes off.
Look for a high-speed flight controller (high processing speed)
Make sure you're using powerful motors that won't burn out. (Check out the new Viking Motors range)
Use high-speed ESCs that will take all the current and more.
Go for Strong and rigid propellers.
Race with high current batteries with low resistance that are going to last the distance. (Check out the Graphene Battery range)
Invest in a good quality FPV camera and video transmitter/receiver with low latency. So you can clearly see where you are going.