One of the best method is to make a magnet out of a mixture of different types of metal. This metal is heated and melted, then placed in a cast, or container that's used to make a shape. Then the metal cools in the cast. Then magnetism is added to it, generally with a powerful electromagnet that's been magnetized by an electrical current. The magnet can also be magnetized by being placed in a magnetizer, which has a powerful magnetic field.