Safety First:
Some common-sense safety precautions are:
1. Don't connect the motor battery until you have your transmitter turned on and you are ready to fly the helicopter.
2. Turn off the radio system as soon as possible after the flight.
3. Make sure that the throttle is set to lowest position before turning on your transmitter. Many digital speed controls have a function that won't allow the motor to turn until the throttle stick has been in, or moved to, the low position. Don't make it a habit of testing this function.
4. Make sure you check that the servos are all working probably before flying.