http://www.autopart.com/tools/toolsmain/tool/T_A378.htm
Put the vehicle on 4 jack stands. The fuel pump is usually close to the fuel tank. Along side the frame the filter is in a plastic case next to the fuel pump.
Have a 1/4 drive socket set and a new filter. Most of them have a plastic clip you press on and pull apart. Some of them require a tool available at most parts stores. Be careful and don't get fuel on you when doing this. As they want to leak after the filter is removed have the new one before starting.