You can put a stop to condensation from forming on the outside of your toilet tank that then drips all over your bathroom floor. The first thing to do is shut the water off to the tank and then drain the toilet using a bucket. When the inside of the tank is empty, dry it out with a paper towel or cloth and then apply a thin coat of paste wax (floor or car will do just fine) to the inside of the tank and let it dry. Refill the tank and you will see a real difference!
The following was sent in by Pat D
For a sweaty toilet tank that drips on the floor, Try an aquarium heater in the tank, one made for a large aquarium. It will heat the water above the dew point and stop the formation of condensate.