Racing
Make sure you understand the basics first.
What kind of charger and power supply do you have?
This is very important that you know when and how to charge/discharge your packs. No need frying those new packs right away due to incorrect charging.
Read and Understand your Radios Instructions. Make sure you have your radio trimmed correctly to your car and the track. Know the subtle adjustments you can make with your radio.
Make sure you have the correct crystals in your transmitter and receiver.
Nothing sucks worse than glitching.