Use a good quality trailer hitch. The class of trailer hitch you use depends upon the gross weight of your trailer - the gross weight being the total weight of the trailer and its load. Make sure you use the right trailer hitch for the weight of your trailer. It should be securely attached to your vehicle following manufacturer's recommendations.

The hitch-ball should be installed so that when the trailer is attached and tightened, it is level with no tilting. If the hitch pulls down the rear of your vehicle, you may need to use a load-equalizing trailer hitch. You may also be able to shift some of the load in the trailer to the rear to reduce the load on the rear of your vehicle.

In addition to a ball and hitch, be sure to use safety chains or cables strong enough to hold the trailer and load, in case the ball and hitch accidentally come apart.