As long as it has proper drainage, it is almost impossible to overwater the plant. Remember, this plant evolved in a bog. As long as the plant isn't in a constant pool of water (up to the leaves), it will do fine. A good rule of thumb is the soil should stay moist but not wet. If you water from the top, stop when water comes out the bottom. If you water in the tray, you'll have to experiment to see how much is necessary to keep the soil on the top moist.

I water mine a little bit almost daily. In droseradude's defense, he may have a lot more humid environment than I do or a much bigger tray!