First, disconnect lamps and appliances in use when circuit went out. Also, turn wall switches off. Identify the blown fuse. When a fuse blows, the transparent section becomes cloudy or blackened. Replace the blown fuse with a new one of proper size.
Socket fuses screw in and out just like a light bulb.
Cartridge fuses, which are usually used in the pull-out section, can be removed by hand pressure. Close the main switch, or replace pull-out section, to restore service. Throw away the blown fuse. Never put a penny behind a fuse. If you do, there is extreme danger that your house or building will burn down.