Decrease Utility Trailer Bounce

Here are some tips to help limit the amount of utility trailer bounce when towing.

Steps

Do not overload the trailer. The frame, tire, wheel and suspension components have been selected based on the load capability of the trailer.
Distribute the load on the trailer so that about 60% of the weight is on the tongue. Your trailer might be different, but generally most of the load weight should be located between the tongue and the trailer tires. If the loaded trailer tilts tongue up before securing to the hitch, the load is distributed incorrectly.
Plan routes with known quality road surfaces when possible. Pulling a trailer over a smooth paved surface will result in less bounce than a gravel covered, pothole laden surface.
Slow down when needed and where surfaces dictate. Reducing speed will quickly minimize bounce should it start. Slow down in anticipation of surface changes (expansion joints on bridges, "speed" bumps, etc.).
Avoid high speed roadways. Uneven surfaces (bumps, etc.) and speed are two significant contributors to bounce. By removing (or reducing) one or the other, bounce is no longer a problem.
Gradually reduce the trailer tire pressure down to (but never less than) minimum. The previous steps should stop trailer bounce, if however, bounce is still a problem, try this last step.

The faster a trailer is pulled, the more likely it will bounce. Avoid highways and other higher speed roadways if possible.

Do not exceed the manufacturer's maximum speed.
Always follow the manufacturer's recommendations for loading the trailer.
Always connect supplied safety chains.
Expect additional weight proportionate braking distances when pulling a trailer.
Never attempt to connect mismatched sized tongue and hitch components.
Maintain tire pressure in the range specified on the tire sidewall or trailer manufacturer's recommendations. All tires on the trailer should have equal pressure.