I copied and pasted from the British Model Flying Association

PRE FLYING SESSION CHECKS
On arrival at the flying site:
(1) Check airframe for any transit damage.
(2) Check that servos and linkages are secure.
(3) Check undercarriage for secure fixing and correct alignment.
(4) Check propeller for damage and secure fixing.

CHECKS BEFORE EACH FLIGHT

(1) After obtaining frequency clearance, switch transmitter ON then receiver ON. Check that all controls operate freely and in the correct sense. Check that all control surfaces are in their correct positions with the transmitter trims at neutral.
(2) Look for any minor radio malfunctions such as slow or ‘jittery’ servos, glitches etc. If in doubt, DO NOT FLY.
(3) After starting the engine and allowing it to warm up, check that the pick-up from idle to full power is satisfactory. Hold the model with its nose pointing upwards at a steep climbing angle for ten or fifteen seconds and check engine operation at full power. If the engine falters or cuts it is usually set too lean and must be re-tuned. Repeat the test until the engine runs correctly in the nose-up attitude.
(4) With the aircraft held securely on the ground, open up again to full power and re-check all flying controls again.
(5) DOUBLE CHECK that all transmitter trims, rate switches, mixers etc. are in their correct positions and that the transmitter meter is ‘in the green’.

Be S.M.A.R.T. with your transmitter.

S...switch on
M...meter in the green
A...aerial secure and extended
R...rate switches all in correct positions
T...trims all in correct positions

CHECKS AFTER EACH FLIGHT

(1) Receiver OFF then transmitter OFF.
(2) Clear the frequency control system.
(3) Clean the aircraft down
(4) Check propeller, airframe, undercarriage, wing fixing etc. for security of fastening and for possible flight or landing damage.


REMEMBER - Never fly with a damaged aircraft or propeller, or with any possible radio problem.

Here is some more help:


RADIO CONTROL FLYING SAFETY

(a) Before you do anything else, make sure that you understand and are complying with the field frequency control system. NEVER switch on until you are sure it is safe.
(b) Before every flight, check that transmitter trims, rate switches etc. are in their correct positions and that each control surface on the model moves freely and in the correct sense.
(c) Immediately before take-off, flight controls must be checked for full, free and correct movement under full power if applicable. If there are any doubts as to their operation, DO NOT FLY.
(d) Flyers wishing to use adjacent frequency channels should first perform an interaction check. Flyers regularly operating together on adjacent channels should perform the check every two or three months.
See the previous section on Radio Control at Your Club for details of the simple check you should perform.
(e) Inexperienced R/C flyers should never fly without an experienced helper.
(f) Unless positive controls are in force, all flyers should use the same take-off area at any particular flying session.
(g) Do not taxi in or out of the pits area. Wheel or carry your model well clear of the pits before commencing taxying and stop the model well clear when taxying back after landing.
(h) Before take-off, check that both ground and sky are clear and never take off or land towards other pilots, spectators or the pits area.
(i) Always make the initial turn after take-off away from spectators and parking areas. Diving manoeuvres should always be pointed away from spectators, parking areas and other people.
(j) Always maintain a clear view of the model and allow plenty of room between the flight path and spectators, other flyers or model pit areas. NEVER fly between yourself and spectator or pit areas, especially when landing.
(k) DO NOT OVERFLY houses, domestic gardens, car parks, traffic, railways, organised games or spectators. You may not be able to control people walking by at a reasonable distance from the take off/landing area but you should take care not to overfly them at low level.
(l) At any sign of malfunction or an unexpected jettisoning of model parts, land as soon as it is safe to do so.
(m) Do not distract pilots, particularly when they are controlling models taking off or landing.
(n) Clubs should exercise strict control over the take-off/landing area used. Pilots about to take off should inform people already flying. Pilots landing should have priority but must call out their intentions ‘loud and clear’ and must NEVER assume that they have been heard. A pilot going out to take off may not hear a call over the noise of his model's engine.
(o) NEVER assume that the landing area is clear even if you have called landing. In emergency situations call for help from your fellow flyers and always be prepared to land in a safe place off the landing area if necessary. In ALL cases, the safety of people is paramount.
(p) Care must be taken at all times to avoid overflying operating transmitters. Pilots should stand together and should not be allowed to wander over the flying area when operating transmitters. Clubs should take action to prevent operating transmitters being taken out on to an active flying area when, for example, models are being retrieved.