In order to get rid of a fever fast, you should drink plenty of water so that you remain well hydrated. Other drinks such as apple juice or any other form of fresh juice is acceptable. Apply a cold compress on your forehead as well as other parts of the body so as to bring your temperature down. Check out http://www.ehow.com/way_5371667_home-remedies-rid-fever.html for details.
Keep a blanket on. It will help your body heat up which will make it want to cool down faster. If you take a cold shower, it actually encourages the fever to get hotter because your body will feel colder.