At some point, most people need an extension cord somewhere in their home or office. But not all extension cords are created equal. Before you head to the nearest home improvement center, department or grocery store, consider these important factors. Where will the cord be used? Indoors? Outdoors? Both? Do you need it for a computer, or in the garage for a heavy-duty power tool? Is the cord going to be used on a long-term basis or only for a short time?