1) Verify the plane is balanced (center of gravity set per the instructions).
2) Pull on the control surfaces, verify that nothing is loose
3) Check that servo arm screws are installed
4) Check that pushrods are connected properly
5) Check that no other pilot is on your radio frequency
6) Turn on your transmitter, then your receiver
7) Move the transmitter sticks and check the control surface direction. Left rudder stick = rudder moves left. Back elevator stick = elevator moves up. If you have ailerons, left aileron stick = aileron on left wing moves up
8) Do a radio range check. (Best to weigh down your electric aircraft in case the motor turns on suddenly.) Collapse the Tx antenna and walk about 30 paces away from your aircraft. Point the collapsed antenna at the plane and move the sticks. You should still have full control.
9) Return to the plane, prepare to start the engine. If electric, hold the plane and gently advance the throttle trim to check that power is available.
10) Carefully place the airplane on the field or runway, pointing into the wind.